Want to add working roof flaps to youre model then follow these easy steps.first use a hobby knife to cut out the molded in flaps on youre models roof.be careful and make sure you get a good cut because this will be youre roof flap.once you get the flap cut out then clean the edges.cut 2 pieces of sheet plastic for the inside box.epoxy these in place(remember to cut slots for the flap arms to fit thru).take flaps and mount plastic stock for arms,drill holes in each arm to allow for pin to fit thru.insert the flap arm thru the inside box and insert pin.now you have a working roof flap.remember when painting that underside of flap and box are painted chassis color on most cars.---submitted by Larry Meyer----