HI; I do believe you have stumbled into a problem most aircraft builders have had at one time or another.I don,t do that many, but, if its a very special (to me) a/c then when I buy it i go to the vendors list in FSM and buy the vacuformed replacement.These parts are made from a different plastic and are very flexible as well as very thin" SCALE THICKNESS" almost.Give it a try on your next one and I sure am glad you had a spare. tankerbuilder