My thoughts were fewer moving parts the better. Can always do duel spool's. Might be a tad longer.
But would be better then using a ion. Ions would need a new spool and a seat for it work as well as something at the rear for an air port. So why bother with making some work with what your building if its not going to be plug and play. Better off making what you need.
Cost of building one still working on that as I don't have all the details I need on the hinge setup. I have the basic idea of it . Just haven't been able to get the details done on paper yet.