Parkzone u/m j3 cub:

[RONALDO_UK]

I’ve had a Parkzone Ultra-Micro Cub for several weeks and it’s my 1st RC plane. It’s had a few knocks and I’ve replaced the tail assembly and the prop and prop shaft. I’ve installed a prop saver and used one of the props supplied which is fairly similar to the original. But the Cub is now a little erratic and unpredictable whereas previously , for a novice, I had quite good control except when caught out by sudden gusts. All the controls test fine and I think my repairs are well-aligned. But I didn’t get an alternative spinner for the prop save arrangement so it’s flying without one - would this make a significant difference?? When I installed the new prop shaft I tightened the plastic nut to give just a small amount of play and the motor sounds fine. I know the Cub is about 28 gms so obviously weight sensitive. But presumably the odd bit of tape and glue has little effect (although these are generally balanced up about the plane)??

I will appreciate any suggestions or ideas.