Anybody have experience with dealer service on X model skid shocks? I don't need a revalve, so wondering if there is a big difference between having my shocks serviced by my dealer (quick and relatively cheap) versus one of the aftermarket shops (Monster, HPG, others?)? Do they just recharge nitrogen or full breakdown and oil replacement, etc.? I've always used aftermarket in the past, but I've always had aftermarket shocks in the past.