I had a NCX 7.0 with a SDM90 this season. It was fine. Rigged nice, and went well. RDM I don't know. I haven't seen it done at our local spots by anyone. Couldn't see why it wouldn't? Should be the same mast curve? Can u try it before you buy?

i run a 7.5 on a 460 rdm 90 and it works a treat.

if anything the sail maintains a bit of curve in the entry at head height compared to
running it on an sdm. this gives it sensational low end. its almost a fake cam!

i use an blueline ally boom and the rig is amazingly light which makes it a joy to use.

on an isonic 107 i feel like i am competitive with the 3 and 4 cam guys. and perhaps quicker around gybe marks.

it really is a sweet set up and i love the lack of rigging / de rigging hassle. i can be rigged and on the water in 6 minutes which is great as time is short and im lucky to have a spare hour- including rigging and de rigging - to get a sail in these days.

and then the lack of crazy downhaul tensions and mast wear is just a pure bonus.

yes & yes.

+1 No-cams are just the BESTEST.

Hmm I do like No cams as they are easy to rig and are pretty darn good now (IE NCX,Koyote, and the new HSM GPX). But at my home spot, the differences between the the gusts can sometimes go as far 15 to 20mph:/ Koncept conditions for me!