I am going to make a sled to flatten slabs plan to use linear rails (SBR series)
There are SBR12, 16 and 20 (in mm's) and wondering if anyone has built a sled with these rails and what size did you go with.
here is an example of a set that is 20mm (SBR20)
https://www.amazon.com/gp/product/B0...A27FLKY64E6N9J
Thanks in advance