okay...researched...thrust jet at 11 o'clock, wheel rpm at 30rpm, all wheels turning same rate, floater head 1.5 " from body...and now:
1. works great for bottom of deep end, but doesn't want to climb wall slopes
2. no problems climbing ramp from deep to shallow, but then turns around back to deep just when it gets to top of slope!
3. flys around occasionally up from bottom of pool
(4. hose lengths adjusted for max pool depth and max pool length; using separate booster pump for power)

at a loss...bottom of deep end sparkling clean, but everything else needs addressing!