What is the trick for pounding the bolts into the wood when adding the shuttle race to a 16-shaft Jane loom? I’ve tried with a mallet and they aren’t budging. The Louet video gives no tips and the other one I found on YouTube just says “I couldn’t do it so I got my husband to do it for me.” (Not an option available to me.) The shuttle race attaches without pounding the bolts into the wood but then the bit that sticks out gets in the way of the first shaft when the beater is pushed all the way back. Are there different bolts I could get that don’t have the square part?