[lincpimp]

As far as plastic welding goes, get an airless model. I have used the plastic welder on a bunch of stuff, and it works well. I own a body shop, so 175 was worth it to me. As far as repairing arms, just buy new ones. You can do most things with a decent adjustable soldering iron, like the cheapo weller soldering station. That is 50-70 bucks, and most likely your best bet. As far as the urethane supply company plastic welder goes, no soldering iron will come close to matching its performance when reparing feet of damage, not inches. Mine has paid for itself over and over, but I have repaired dozens of bumpers, fairings, and interior plastics.