I'm trying to add the hitch adaptor of my Burley HoneyBee trailer to my Radwagon 3 but the rear axle isn't long enough to allow enough clearance to use the hitch adaptor. I've tried various "thread extenders" but can't get anything to fit. The cleanest solution would be to have a longer rear axle... Does anyone know of a longer rear axle out there what would fit a Radwagon 3? I need only 5-10mm extra to clear the frame tubing and screw the nut back on.