VPI owners--recommended upgrade

Normally, I don't start posts like this. I usually start a thread when I need advice (usually on particular music). However, Music Direct was recently offering a special on Black Diamond Racing clamps for VPI tables. The price was $149 and was labelled B-stock, however, it appears that it was not B-stock but just an overstock. Anyway, I decided I would try it. I really did not expect much--it's a clamp right--the VPI stock clamp works very well. Well, I was amazed. The immediate improvement was improved bass, both extended and better defined. But that wasn't all, the midrange layering was much better. Better imaging, better soundstage, really everything improved. This has probably been the most cost effective upgrade I have ever made to the analog front end of the system.

Now, that I have VPI owners attention, I do want to ask a question. I'm considering 2 other upgrades: Anyone with experience in the upgrade from the spring loaded legs on TNT models to the air bladder legs please comment on your findings and second, anyone with experience with the PLC conditioner to the SDS system. Thanks for you help--and if you haven't tried the BDR clamp--I think you'll be impressed.