Hi Boscoj. This is my b'shell routine. Cut the extra lexan from below the cut lines all around the b'shell. Mark the shell with a pen for the hole to let the roll over mast through. Then use a REAMER to cut that hole out. Then line the shell up and mark where the holes need to be for the 4 bodyposts. Use the reamer again to made these holes. Then mount the shell (the wheel arches are still in place at this point) onto your chassis making sure it is at the correct height for when you race the car. Now mark the wheel arches where the axles are in the middle of the arches and slightly outside of where the tyres will be inside the shell. Now take the shell off the chassis and use a COMPASS CUTTER to get perfectly round wheel arches. Give the edges a sanding to get rid of the sharp edges that can dig into your tyres during a crash and hopefully your now good to go. Feel free to ask any questions in you are not sure about something.

Cheers bud, Chris.