hobie where are you getting that price ? The idiots at TK here in durham have told be over $10 (EACH) to dismount.... Part of the reason i got a manual changer...
But, problem with the manual changer is, if someone dones't have thier own, they likkly dont know how to use it right, and end up atempting to damage a tire or the machine. Thus I end up doing it. Plus swampers are a pain at times and you need a little finess...
Ken a HF changer is $35 ish on sale definiflty a cheep tool investment. I bolt mine to the trailer when i need to use it... Bead braker feature works nice also