Absolutely. I think there are quite a lot of people who don't know how much more rigid and accurate a decent quality profile rail is over SBR Chinese rails. Anyone putting a lot of work into a machine would be doing themselves a disservice to use SBR rails. I built 2 machines with SBR20 rails. Yes the machine could still produce decent work but, I finally "saw the light" and tried some profile rails. No comparison.After having these rails and playing around with a 20mm SBR that a friend had, I am sure I made the right choice even though they cost a little over twice the price. Hell, they would have been worth it a four times the price.