installing carpet in a race car

If the carpet, hasn't been installed where your roll cage is, try this. 1# figure where you want the hole to be. #2 Using a piece of the roll cage material, (about 6" or more if you have any, or a piece of similar pipe diameter.) Sharpen, to a knife edge, the circumference of one end of the pipe. #3 place the carpet on a piece of stout wood and center your sharpened pipe on your mark. Give the pipe a good whack with a heavy hammer until the sharpened pipe cuts through the carpet. #4 From the closest edge of the carpet, from the new hole, cut a straight cut to the edge of the hole. You can now lay the carpet back down, passing the roll cage through the cut you made, allowing the hole in the carpet to go around the roll cage neatly. If your cut is made from the carpet backing, without touching the carpet's knap, when you lay it down, butting the cut edges tightly together, you will hardly see the split.
Norm