Hi Mike,

I agree that the first thing to do is to assure the rigging is as close to the specification as possible meaning wing dihedral, wing washout, flaperon mixer settings (there is at least one kitfox incident where the investigator - correctly or incorrectly, blamed the incident on the out of spec flaperon assembly/settings)

Once a person is assured the rigging is right, it would be time to work with the fine tuning - that is where many of us have solved slight roll tendencies by adjusting the rod ends (not all that uncommon in a new aircraft).

FWIW - Our S7 had a left roll tendency on first flight...fine tuning the wing washout by adjusting lift strut rod ends - one rod end at a time with 1/2 to 1 turn before flight testing again.

What constitutes a sever roll might well be percieved differently by different people.

With your observation that with power the problem is manifest; but, power off it doesn't happen causes me to think a person may also want to check the aligment and rigging of the tail too....and how much rudder a person needs to use.

I found that any testing and changes are best done in small increments and one at a time so a person can tell if the trend is going the right way and there are no really big bad suprises.

Good thing to keep in mind....none of us are there with you and ultimately the person working on the plane is the only one in a position to account for items that may be totally unknown to distant observers.

Best wishes in finding the problem.

Sincerely,
Dave S
KF7 Trigear Flying
912ULS Warp Drive

St Paul, MN