No not from eBay, from a fellow RC'r.
It was originally from a Xmaxx then used on a Slash with a HW WP-SC8 ESC, no calibration issues reported on either.
I've trawled info and can find no mention of a XL5 incompatibility, have you located something?
I'm talking with TRX support, they've had me do the usual resets and ESC calibration but no joy, awaiting more info from them.
I can fool the ESC to calibrate (sort off) using the wheel channel to set the FWD/REV ends and I get the correct ESC confirmation led blinks, if I then move it to the throttle channel I get full speed proportional throttle but only on reverse stick, and very slow in FWD, if I then invert the FWD to REV in the HCU, FWD has good stick range but the car physically runs backwards so I’ve had to swap the motor +/- wiring.
I can get forward but now only get about 10% Rev, it barely moves backwards.