I am wanting to add a little more preload but realized the bike does not come with the wrench to change it. Anyone know where I can get one cheap? I didn't want to beat the crap out of the nuts with a hammer and screwdriver to change the settings. It would be nice to add a little more preload when my girlfriend is on the back(insert fat girlfriend joke here). She only weighs 120 pounds but enough to make the back end sag and the front feel too light. The settings are stock right now, I weigh 200 pounds and was also wondering if anyone with the same weight has alterred their settings for solo riding?