I have a North X-type 5,4 from 2012
I use this sail together with my 6,6 and 7,8 X-types on a 460 SDM mast

Now I want to buy a new mast to get into wavesails.
Can I use my 5,4 sails with a 400 mast, with an extention maybe?
Should I get an RDM or SDM mast?

On Norths website the specs say
Luff 4,43m, variotop
Mast best/alternative 430/460
Mast geometry best/alternative SDM/RDM