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The higher you set the driver rev per number is when you need to mess with frequency because your max velocity available changes. That's when you need to change it to gain more available velocity....

Replace them with normal.
When it comes to fitting angular contact to fit in BK blocks, finding the size at a decent price you'll be lucky.

Get the machine running and make your own bearing...

Oooops. Sorry.
This one:
https://www.ebay.co.uk/str/cyber-ebusiness1986/DFU-Dual-Ballscrew/_i.html?_storecat=22348999012
These are the ones on my machine:...

The Toolco32B will be pretty much the same as the AMAT30LV.
I prefer the R8 taper and Toolco only had the 32B in MT3 when I last checked.
The Warco is geared so that put me off it.

Following on from my last comment.
Have been rebuilding the X2 which is why I hadn't got round to look at mine yet.

Now in truth I am a little stumped!?
Just got round to un-crating my AMAT25LV...

The AMAT25LV is the machine I'd go for. (Mine is still sitting in it's crate)
Unless you need a longer Y, then I'd go for the 30.

The 25 is closer to the Precision Matthews PM25V in terms of...