Harry told me which to use. I think the others are for the older tables. The 1/4th -20 work, I have been using them. I ordered the washers in case but horrors! didn't level my table when I put the new feet on. I know, I should have but it sounded great. My new table is here so I have to take the new feet off the Scoutmaster and put them on the Aries. The 1.5 is the correct height. Just a little lower than the VPI but works fine. Use one washer and it will be the same. The 2" height would probably work too if they have the right thread size. The coupling discs work too. I have been very happy with Star Sound products, their rep lives in town and he brought some over; thats when I decided to become a dealer. In case any of you think I am promoting them to make money, I haven't actually sold any yet. I don't maintain that they are the absolute best thing on the market, there are many products I haven't heard. But they do work as described and have made my system sound considerably better. Stan