mastercb wrote:** More rigid design of gearbox cover
Uh, the original gearbox cover was sturdy enough.
mastercb wrote:** Moved position of gearbox screws (better sealing effect)
That's not where the pet hair is entering..
mastercb wrote:** Introduced washers on some (not all) gearbox-shafts (for better shielding the shafts against dirt)
Against dirt? Uh, dirt isn't penetrating into the gearbox. Pet hair is.
mastercb wrote:** foam plastic ring on the motor drive shaft (as known from black CHM)
Yea, nothing improved there..
mastercb wrote: ?? possibly returned to a no-ball-bearing-design (as known from red CHM) (not 100% confirmed) ??
iRobot 'thinks' they know what is causing the issue.. Seriously iRobot!! Make it mandatory
to have your engineers come over here and read what is causing the CHM issues. Quit Guessing!!!