So the push bar that comes with the RPG has a large or thick eye on the bar so it doesn't fit in the slot. It's also to long. No worries. The way he made the RPG all you have to do is cut a needle bar about 5/16" shorter and file the end smooth and rounded. I really didn't like this machine for lining because of needle walk, but I have a feeling it's going to be a lot better now with carts. Just thought I would share.
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