I thought the "H" designation was for helicopter? I will admit to not even owning any OS engines by my choice. I have 2 old 25 FP's laying around I got in a trade once. I may be wrong. So as several other posters say the same thing consider my advice suspect. on that engine. Lots of my freinds have them. So I see a lot. And I keep my eyes and ears open. Learned a lot. OS's are good engines.

I would suggest a new 46. Thundertiger makes a nice one at a good price. The 46 Pro is a good engine well worth the asking price. Good luck with your T-master. You will love it it is a great plane.

Mark Shuman