you need hot air station,razor blade, hot glue gun,heat shrink tube <17mm clear is advised and patience . you heat one side of handle until it starts to bubble....heat it slow not to boil.Heat will destroy hardness of plastic in that location and you shave <0.5mm of it and then rotate to other location do the same WARNING be aware of location of parts side(there is 2 thin contacts of heater element, that side is where parts reside)when you want to reconstruct it you use hot glue and heat shrink making as possibly similar to original as possible then put on heat shrink and heat it corekting any hot glue misses.