That's good. I'd be looking to replace those washers in the long term like I said above,
"I would get a 2mm or 2.5mm spacer form the eBay vendor and use it on the inside of your Motolanna. You definitely want the centering ring. Another option would be to contact Motolanna and see if they would make one up at 12 or 12.5mm."
Yep, just a temporary fix for now.