I like your solution. Unfortunately my 10-30 connector is in the wall maybe two feet up from the ground directly behind my dryer, i.e. not accessible unless I physically move the dryer a few feet out. Do you know if anyone sells a 10-30 extension cord? I don't need it very long, perhaps maybe three feet would be sufficient. I could then plug the dryer into the extension cord most of the time, and then unplug it during those relatively rare times when I need the 240V charge.