I just installed an Airmaster propeller on my Kitfox. One of the things I noticed is that I'm getting some heavy shaking on the stick during takeoff. As soon as I switch the controller from takeoff to climb, the shaking stops. I looked at my Insta360 video and I think I've found the culprit. The horizontal stabilizer is doing a bunch of moving around right after I get airborne and goes until I switch to climb.

I know this is a common thing with super cubs but I've never heard of it with a Kitfox. One thing to note is that on my airplane I usually trim just nose down of neutral during takeoff. I have not flown the plane again since I've seen this video. I'm wondering if it makes sense to try more of a nose down trim.

Has anyone else experienced something similar to this. I'm running a 912is Sport.