You will enjoy the four strokes.
I took my Lucky Star trainer the other day to the field so my instructor would fly it to see if everything was fine.
There were two chaps there with 2 strokes planes, 46 size i believe, and a Magister.
The electric is electric, but when my trainer took off, you won't believe the wonderfull sound of a four stroke in the air, like a real airplane, but so so quiet! My ears hurt when the 2 strokes started flying, all that whining...
Good luck with your engine

Bigtim, check out the valve clearance, and then clean the carb and set the needles.