Hi gb
yes to all.
The C/W shaft unscrews and is removable. This leaves two similar ends, both which accept a saddle. I actually used it a few times like this, with a Mewlon 210 on one side (used the Tak supplied saddle screwed straight on) and a North Group ED127 refractor on the other side, with a Losmandy saddle screwed on. Worked a treat, but if you only use one side you really need the C/W shaft and a weight.
I'd have to check, but from memory 3/8" thread. Whatever it is I was able to source a bolt in my "bits and pieces" container.
"Silver Base" is actually a disk of polyethylene or whatever, cut into a disk with the trusty router and with a hole bored in the centre to accept the base (it has a slight step). If you want it you are welcome to it as well.
That help?
Gary
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