Yeah so far I just kinda winged it on the size and location of the holes. I knew where I wanted them to be in relation to the seat so I drew out the initial squares on the carpet then I drilled small holes at the corners and checked from below where it would end up being. I then cut about an inch bigger opening in the carpet to leave room to cut the metal. I used a cutoff wheel in a grinder and a sawzall to do the cuts. I put wet rags around to save the carpet from the sparks. My axle is moved back as far as it could prob go with the tank there still. I'll get the mounts fabbed up then more updates on it.I am watching this closely, as I need to cut holes in the rear for mine too...