Abu 550 Plus

[Istock1]

I have a "like new" 550 Plus that I got for almost nothing with the dreaded single leaf dog that doesn't work right anymore. It looks like the inner ring that slides onto the post broke from the leaf and the cog part ... it's now three pieces instead of one.

So I think I'm trying to turn this:
http://s7d5.scene7.com/is/content/purefishing/Abu%20Garcia/Schematics/550PLUS%200102.PDF
Into this:
http://s7d5.scene7.com/is/content/purefishing/Abu%20Garcia/Schematics/550PLUS%2091-0.pdf

As Ken_D mentions in one of the threads here, it looks like I will need to provide space between the anti-reverse wheel and the drive gear to accommodate the second leaf, but am not sure what part number to order that would work. Would 10271? Thanks!