Hi Rob, Well, regarding the Sub SA3135 it's essentially stopped running correctly as it stops after a few hours while I am wearing it, so...I gotta call that one broke (but correct, no stem breaks on any of them for me). The case for the Sub, in my opinion, is not as nice as your YM, and since I already have a Noob Sub, I just don't think I want to spend the money on it. But, contacting Katt is not a bad idea. I believe he has seen Rup's SA3135. I'll ask him his opinion on the viability of servicing and cost.