I have flown a 4-stroke telemaster for several years. OS.91 on a Senior TM. It flies like a dream.
One thing, tho: The bearing cavity, & crankcase is not purged with a 4-stroke like it is with a 2-stroke. When you dunk a hot 4-stroke, the chill causes the air in the crankcase to contract, which sucks water into the crankcase vent. It tends to stay there. The bearings, crank, cam, and tappets will all rust. I let mine set up several weeks, and it was locked solid. A buddy's ENYA did the same thing.

Suggest you regularly flush the crank vent with a corrosion inhibiting oil. Corrosion-X is my choice, but Marvel Air Tool Oil is pretty good, too. Stainless Bearings from Boca are good, but the other parts are still steel and they will rust.