starting a new topic here to address help in possibly setting up a legacy with linear bearings... suggestions for possible sources of materials and anything else that might make this mod as easy and inexpensive as possible....first photo is of a piece of sample track and a carriage type, both from PBC LINEAR, sitting on a piece of legacy rail...this is PBC's "low profile redi rail' line...total height is 3/4"...the rail is 1 7/16" wide(legacy rail is 1 5/8" wide)...this carriage is 3" wide and might not work well on the the legacy...but i did get it as a free sample it does allow me to play with the mounting a bit...difficult to see, but there is a 't' nut inside the legacy rail that was gotten from mcmaster-carr...it has a 1/4-20 thread in it and needed very little modification(file the bottom corners a bit and filed the top down just a hair) to make it fit the legacy rail...the PBC rail comes pre drilled with holes exactly in the center of the linear rail, so it is practically self centering onto the legacy rail(due to the "t" nut)...they also have a set up called "redi-rail slide" that is a TOTAL of 1 3/8" wide, which is less than the legacy rail...the height is a bit more than the low profile rail though(15/16" +/-), but certainly acceptable, i believe...the only problem with these set-ups(and others from other manufacturers) is the cost...usually rail will cost around $30 per foot and a single carriage can cost around $70...so an "X" axis alone would be in the neighborhood of $640(2-6ft pcs. of rail and 4 carriages)...add in the "Y" axis(do not see a need to do the "Z" axis), and you could easily be spending $1,000 when shipping and other expenses are factored in...so a pricey mod for sure...anyone have some definitive, less expensive sources for rails and carriages?...i do remember reading jon preston's posts regarding his mod (excellent work!) and his finding inexpensive bearing hardware on ebay...and i have seen the same or similar my self, but they all seem to be coming from china...and with all due respect to burney's mod, this is a bit better due to the fact that you can adjust the bearings on each carriage for wear(which should be in about ten to twenty years!...LOL!)...these rails will also add some rigidity to the legacy rails(if it's even needed at all)...joe
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