Installing electric elevator trim on my 7A. Removed the manual trim got and have the kit from Vans. I have the trim servo temporarily mounted to the access plate, but I cannot fit the whole business in the elevator hole. I have a small area ⅛ inch on one corner that prevents the servo and channel support from clearing the opening. My plan is the remove material to fix this but trying to decide whether to do it on the elevator doubler plate on the channel support. Any opinions?