Steve they have def got the system sorted. Its taken a while but like anything you will behold to whoever carries out the servicing. Maybe you just buy a new battery and keep a spare charged up.
Question is ?
Will it really be that much better. For me def not. I can re set index gears in about 10 minutes. One thing that will be interesting is if you knock the rear mech out of line. I can see it now.
Now bring it in and we will sort it. Ah that will be £150 quid please.
The average or even above average rider would be better spending money on upgrading their wheels