I made this a while ago not long after I bought my bot, it gets used on occasion not as sophisticated as an indexer it works fine for general turning. At the time I used what I had at hand in the shop some 1 1/4 steel square tube, flange bearings support the drive side and a metal lathe live center is the tail stock.
Just did some table legs for a customer on it.
A short video of it running I put a few clips together the whole leg takes around 25 minutes to cut.
https://vimeo.com/318999193