One of the best ways to check your CG is go up 3 crash heights, roll inverted and if you have to push the elevator down quite a lot, you need to reposition the battery aft. Object is that you only need a touch of elevator nose down to get it to fly level upside down to get the proper CG. I fly 3D, so that tells me that this is the start of moving the battery back to get my aft CG that I need.
As for the hairy landings, you are not taken account of the ground effects especially with the lower wing so close to the ground. This changes the induced drag which you need to understand. With enough practice, you can learn how to ride in and out of the ground effects so if you need to land further down the strip, you can.
Also suggest you incorporate the use of your rudder in your flight from takeoff to landing. That will calm the plane down in your movements and especially help you when their are cross winds and gusty conditions for landing.
That's why not too many pilots have a bipe.