Unfortunately, the sliding piece that is inserted into the rail is a bit too narrow. It can snap out under higher loads. I'm having an aluminum sliding piece made for me. The upper part is OK.
I ordered rails with the designations M, N and O because I needed samples for building a boat. The N rail was bent, which is ridiculous considering the price. You can't send something like that!!!!! Regards, Roland Winter Pfarrgrabenstrasse 35 A 5164 Seeham Tel: 0664 2481212