For anyone thinking of using the 16mm shock bolt hole on the 109 rear for mounting a side mount plate, plan on going to a Fastenal Store to get the bolt. I searched high and low and could not find a auto parts, hardware, or motorcycle dealership that stocks a 16 mm bolt. After much frustration I visited a local Fastenal Dealer and they didn't have a 16mm X 20mm by 1.5 pitch in stock. They located one, in stock, at one of their stores in Texas. Having it shipped to my residence and should have it in a few days. I'm doing a one off side mount license holder from 1/4 thick aluminum plate and needed the extra length bolt for mounting.