Rega RP10 VTA shims

Drubin, here is the link;

http://www.needledoctor.com/Acoustic-Signature-Shim-Set-for-Rega-Tonearm

Also
http://shop.generubinaudio.com/Acoustic-Signature-Spacers-for-Rega-Tone-Arms-859758961793.htm

I ordered today but upon further investigation, Gene Rubin appears to provide 4 shims whereas NeedleDoctor provides only 3 for only 4.00 more.
I am going to re-order once I get a confirmation from Needle Doctor. Unfortuneatley they are closed till Monday.

Also these are for a RP 6 and the RP8/RP10 use a larger screw, so I will need to drill the hole a little larger
but that shouldn't be much of an issue.

Jonathan, Thank you so much for your response. I have found some shims that are available in .5MM increments.
I am planning to order those and set it to 3.5MM I realize that is just .1MM to high. But if I fand that the performace is "dialing-in" to an optimum sound, then I can
approach a machine shop and have a custom 3.4MM machined so I have a solid shim rather than a stack. I had thought about Elizibeths suggestion, but felt (no pun) that a thicker mat might effect the sound or benefits of the ceramic platter.
But this explains why I get better performance at 4MM than I do at 2MM, although at 4MM the bass was to muddled although deep. I am excited to try the 3.5MM and then narrow it to the 3.4 as budget permits.

Mr.Carr, your help and advice is greatly appreciated and invaluable to me and I am sure all Rega owners owning or seeking Lyra. Thank you very very much.
Theo

PS. I do have a question, what is your advice on de-magging
a Lyra, I see small metal filings, I have no idea how they get there playing vinyl, but I see them in my magnifing glass?
cartridges.

Mr.Carr, thank you once again for your insightfull response to my question. What an education, you have provided me and the readers of this thread. I had no idea all this was taking place inside the cartridge and that the process or service from Lyra was available to restore the cartridge's performance by the cleaning. I guess my next question(s)is, how long does this take and where do I send it? I wouldn't do this for a few months as the summer time seems to my lowest listening time of year. And I want to get the table fine tuned with the shims I have on order and enjoy it for a time before it takes a leave of absense.
Is this something I should do thru my dealer or can I send it direct, that latter being my preference?
Again thank you, you have provided a wealth of information of not only Lyra but cartridges in general.

Thank You
Theo

As a follow up, first off, a sincere expression of gratitude to Mr.Carr for his advice. I received and installed my 3.5mm shims and readjusted everthing accordingly last night. I was a little hard to get out of bed this morning as I couldn't stop listening last night.
This brought everything into focus, the bass is deep and controlled, the mids and highs have a very natural presentation. The sound stage opened up and lifted off the floor. I could go on and on, but the jest of this is, if you own a RP8 or RP10 and a Lyra Kleos, get the Acoustic Signature shims referenced above or have a custom 3.4MM shim made. I just wanted share my success story. By the way after years with an LP12 that was in perfect tune from the dealer, I am not looking back with any remorse. This RP10 equals and may exceed performance of that table. I am very happy and am picking up my new custom dustcover later today, as I am using this in the "skeletal" mode and have the plinth and dustcover packed away. Rega has realy outdone themselves.

Hello Jonathan,
I completely understand that the servicing could become a problem of attracting "cartridge hypochondriacs" (grin), and further your production backlog.
As far as the shims metallurgy contributing to the performance, I don't know. The Rega shims are stainless steel and the Acoustic Signature look to be but have a slight magnetic attraction. I am wondering if magnesium would be a good choice since the top brace is magnesium. I do think once I get a solid 3.4mm shim fabricated it will be better than the 2 shims I am using now. Plus the fact that they are in 4 pieces due to the design. Although it makes it quicker and easier to add and remove, I question just how solid of a foundation they provide. Any thoughts you could share would be welcome.
On the demag or degaussing concern, what is your thought on the method of shorting the leads by touching the RCA connectors? I would like your direction on this before I risk ruining a perfectly good cartridge.

Again my gratitude abounds for all your help. It has increased the value and pride of my Kleos ownership.
Best Regards
Theo

Vinylkid, I took Mr. Carr's advice to the first step and bought 3.5mm in shims but yet to have had one made at the 3.43 as suggested due to time and budget. But I have been very pleased with the VTA setting for my Kleos. I wonder as well if the .57mm will make enough difference since vinyl thickness varies as well. It is unfortunate that Rega doesn't accommodate a more practical method of VTA adjustment, but I believe their cartridges provide optimum performance. So offering easy adjustment may be viewed as contradiction. Just my opinion of course.
One observation with my setup, I would pass along is, that this table is sensitive to the surface. My cabinet is an older hollow body cabinet and I realized a "guitar body" resonance in the upper bass/lower mid range. I am using the Aurio's with an MDF cored platform from my LP12 and this has eliminated that issue. However I am going to use a maple cutting board once I get it completed and hope to further the progress.
I would be curious what you are finding with your table.
Regards
Theo

Mr. Carr, thank you for looking back at previous posts and responding to my question. I have read your response a couple times and must admit it is a little over my head. But if I understand your statements correctly, I could use a fluxbusting device, I should have favorable results. Any suggestions as to a brand or model with which you have had favorable results?
Thank you again for responding.
Theo