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Drive training wont help with tracking errors, only gotos.
If the object is slowly drifting out of the FOV, you more than likely need to adjust yr tracking rate. Its a std setting in the Hbx.
Many LX90 users have to adjust this to get the scope to track at a correct sidereal rate ( esp if PEC is ON )
As to rebalancing on the fly, you can cheat a little if you want.
The scope uses the encoders mounted on the motors to determine where it is.
As such, if you release the clutches, it wont know ( or care ).
Thus, slew to a well identifiable star, Acrux or Rigel Kent are good, as they are unmistakeable doubles, and let it track till stable ( say 10 secs ).
Loosen yr clutches and manually rebalance as reqd. Once done,
manually slew the OTA back to the target star ( without using the HBx )
You can normally get the star back into the centre third FOV of a 26mm EP this way.
Once its close, lock the clutches, fine centre with the HBx and then do a synch. Yr back and running and no loss of alignment.
Andrew
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