This isn't a particularly good windy-day plane, as you have seen, and especially not good when the wind is turbulent, because it has a pretty low wing loading. However, this makes it good in almost every other way.

The amount of down elevator for the wheel landing is very little - just a breath, just as the plane touches down. This is why it is easier just to adjust the down trim when the plane is flying a smidge above stall speed so that it takes a tiny bit of stick to hold it level, and then simply relaxing the stick to neutral makes it stick on the runway with enough speed to keep the tail up. Also helps to use the "high" setting of idle-down as your "wheel landing" regime for Tx programming. Easier with a 4-stroke anyway because they like to keep pulling at low throttle... though I don't know about that with a 16x4.

I don't think this plane is capable of good KE climbing - let alone KE loops - because there just isn't enough side area. Mine also requires a lot of throttle just to maintain KE, and even then with quite a bit of yaw to hold it. But my CG seems about right at 125mm.