RCM recommendations

Wow, the Loricraft is quite the step up.
http://www.smartdevicesinc.com/loricraft.html

Were you using the same cleaning fluid formula's for both machines when doing the comparo ? Is it just a matter of the loricraft vacuming off the solution better ?

yes the Loricraft is quite a step up, no question about it.
I have the same PRC3 machine and can only ask you, are your records worth it?
First used Disc Doctor and now use Walker, both are very good in my opinion, have not used any others so cannot fairly give a view on them.
There will always be better as well as worse, what works for you ultimately is what;s important.

The Loricraft is a fine machine. and they are quiet.

Yes, we used the AI 4 step method that has been well documented here. Used that same brushes also. Since my collection is decidedly vintage, I think the PRC4 is the best fit for me.

Sbrown,
I'm sorry but I'm a bit skeptical, to say the least, about your experiment. The actual cleaning is done by hand, not the 16.5. Considering how strong the vacuum is on the VPI machine, I seriously doubt it leaves residue that would progressively degrade the sound of the records cleaned with it. Perhaps you need to perfect your cleaning technique or use different brushes. I also seriously question paying well over $2000 for a cleaning machine for an individual use unless you're very rich. I've used the VPI machine and it's a fantastic performer for the price.