Transformers Inferno Grapple Crotch peace

This is my proposition to fix the Transformers Inferno/Grapple/Hotspot/Pyro/Artfire croch problem. In robot mode he has no proper crotch and a skirt made from his bumper. This peace slides on the part that is under the bumper and creates a proper crotch. It does allow for transformation and you do not have to remove it in truck mode. IMPORTANT: What you see on the pictures is the modell i tested on my home printer. Shapeways print will be more clean howewer untill i get my ordered print i am unsure abaut the sliding part. I could be off by ~1 milimeter and you may need to ajust that as it may be litle loose. A drop of paint or a nail polish should help.