hmm - as you say the horns should be ok!
I've reached the limit of my knowledge (guesswork based on experience - wheel hop is NOT fun!!) on what it could be but will watch with interest for any other ideas.
may be an idea to post CAL your LOOK query LOUNGE elsewhere to see if you get more ideas (not to downplay what you've had so far but a bigger net can only help)
I'm a slave to the South, there's a curse on this house