It’s easier for me to sharpen the heads before mounting. I just carefully hold the hot head with pliers when mounting. I’ve never had good luck pushing the hot broadheads into wood—it seems like they were always misaligned and it took a lot of time to get them to spin correctly. The best thing I have found is a grooved tray to hold the arrow, so can I slowly rotate it and with LIGHT pressure, push the arrow/broadhead into the alignment hole. So the only part of the broadhead touching anything is the point and you are not pushing hard enough dull it. I can’t remember where I bought this but it would be pretty simple to make one out of wood.