I did remove my cap pin very carefully. You have to be careful not to bend the cap hinge. I got a real thin punch and started it that way but did not like the pounding. So I used a thin steel lock pin and a C clamp to push it through the hole. When I reinstalled it, I used a BB on the C clamp to crimp the edge over again. Worked fine, just take your time and put some protection on the tank so you do not ding it up.