Hi all chip sweepers,
I found that this product, Finish Line, can solve the problem with trapetzoid screw I increased the speed 5 times with this product meant for bicycles it contains teflon very nice to use.
If the trapetzoid screw is made of steel and the nut is made of brass don't use WD40 it is to thin and it may help to carve into the nut use it as carving oil when you makes threads.
Leffe
This is the site of The Zoltar CNC Router they have many links to great products for people that will build routers
http://www.rcmodels.net/cnc/