A few things I learned after a couple of weeks owning this table and playing the heck out of it.
The squash balls work, just make sure they are on a stable platform. I tried a few convoluted approaches and none were better than the stock feet on a solid platform and rack. Not saying they can't be improved, however.
Get a spool of the proper belt thread and all your belt issues magically disappear. They may break now and again, but if you have a spare (or about 300 spares on a $3 400 yard spool) who cares, just slap another one on. (I broke the first belt changing speeds, now I'm more careful and haven't broken another changing speeds or otherwise since)
This table is pretty close to set and forget, and seems to be stable after a couple of weeks. I've heard the previous WTL tables were tricky to set up; I find the Amadeus to be easy and straightforward. VTF, VTA and azimuth are a breeze, and no overhang to mess with is nice.
The fixed cartridge overhang/offset angle seems to work just fine. When I auditioned the table I played a few songs at the beginning and at the end of a side with the sole purpose of exposing OGD or IGD. I heard none in the shop, and I've done it a few times at home with the same result. I have a Mint Best mirrored protractor built specifically for my Rega and I swear that something like that is necessary for proper alignment. So how this fixed thing works is beyond me.

I almost forgot - No tonearm cue quickly becomes irrelevant. So much so that I was trying to think of anything else to add to this list, staring at the table and almost forgot about this. And this was the main reason I was NOT going to buy a WTL. After only 2 weeks I really don't even think about it.
Just my 2 cents