Dulfermetal

Here's a late response- I did a conversion with my No. 7, which I've been using professionally for 8 years since. In addition to building a tower for the motor and jackshaft, I repositioned the idler arm by cutting off the original pull arm and adding a counterweight. This allows the entire linkage to hang from the idler assembly so there's no slack in it when you first step on the treadle. The idler arm assembly is cast steel so it's easy to weld on new parts. I also replaced the idler pulley with an aluminum one that has ball bearings. It's lighter, more durable, and more concentric. Makes the action snappier. Here are a couple photos to give you some ideas (if you still need any). You will love your hammer once you get it running.