OS H60F GP Any good for stunt?

I have been looking through some of my old RC engines to see if any of them are suitable fror stunt. This one cought my eye. It is a 25 year old crossflow ringed engine. I flew it in a number of RC aerobatic models - Phil Kraft Barfli and Quickfli - always a good starting engine and a reliable runner, it is still on good condition and, although possibly a bit heavy at 13.5oz how would it be in a Sig Magnum?

has anybody any experience of these engines?