Need help!
 

Can't seem to find a back plate for my RB728, I am wanting to make it a bump start instead of a pull start, so I was going to make my own. So my questions is how close to the crank does it need to be. Does it need to be close like .010 or can it be .100. It doesn't matter to me I can do either way just need to know if there would be a problem with it being farther away. This would make it easier if it doesn't have to be close!