RocKrawler
Supporting Sponsor
Place the cap over a block of wood, place the strap over the hole it pops into and ********** with a light hammer or deadblow. Make sure you are supporting the flange from the bottom or you can/will crack it!
Thats actually the first thing I thought of and tried, didnt work - I'm going to try a c-clamp next & see if that pops it in...