Hi!
I see the post is quite old, but I am planning a similar build so worth it a try. I would like to make a carousel style ATC for a similar machine to yours (Optimum BF20L) controlled by USS.
I was wondering whether you finished the ATC and tested the sreenset and M6 macro for it? Moreover how did you attach the ATC to the G0704? Normally the ATC is bolted to the column but I am afraid the weight of the ATC + tools will distort a bit the already not so rigid column of those machines.
Thank a lot!
Alessio