I am about to take the plunge and go RDM with some of my sails, so I'll need an RDM extension. I have not bought an extension in years so I have forgotten some of the things I didn't like about some of them.

I want one with 3 pulleys
I do not like the pin and collar system
I need Europin
Severnes rig on the wrong side
KA sails, so sail block is perpendicular to the mast

Any other pitfalls to look out for other than length?

Which brands fit my criteria above?