i have a 05 honda shadow/aero. my shocks are currently set at setting #2 (settings run from #1 - #5). i would like to try a "4" setting. owner's manuel indicates i need a "pin spanner" to make the adjustment. i believe a pin spanner is a specialized wrench. should i take the bike to the dealer to do this, or buy a "spanner" to do myself? if anyone has any experience along these lines, feedback appreciated. ps i want to try the higher setting to see how it affects my ride, as usually am over 210 lbs. when carrying gear, saddlebag stuff, etc. thanks.