I need to figure out how to put my chain on. I've watched this video here Panofish Blog Motorized Bicycle – Part 2 and he shows how to punch out the chain piece and remove links. I don't have the chain punch he has but I tried it with a nail and couldn't get it punched out. Am I missing something? I didn't try too terribly hard (didn't want to break it) but it feels like it should have punched it with my force. Just have to give it some elbow grease? I have the grubee skyhawk gt5 66/80 cc kit, if it matters. The chain that came with it looks a bit bigger than my bike chain.