Istvan hi
You can call me Vagelis ( this is my name)
Sorry that i cant help you as i dont have any experience in profiled rails and carriages.
The rails that i mentioned in my first post are the only one that i have ever bought
So no experience at all ( other than the price and the dimensions of the rails that i have bought
I havent even use them in my machine

Wish you good luck

Vagelis