> Ok, I do have a question :-) What I did not see / read on your pages
> is what kind of sliders you use. I.e. if you use regular threaded
> stocks and nuts or if you use more precise stuff and of course if it's
> really possilbe by using regular threaded stocks / nuts only to reach
> the precision you claim for the "brute".
>
Just wanted to add my 2 cents--- I had a machine with the precision stocks
and accompanying nuts and later made one with standard threaded stock. I did
not see any difference in my PCBs from one machine to the other. I think
there are probably a wide range of accuracies, though, in what you buy and
where. I would inspect the threaded stock with a nut and see if there is any
noticable side to side play first.
-Mike