Many of these units have a plastic/ carbon fiber impregnated group collar.Originally Posted by 605B41584F2E0 link=1284957507/0#0 date=1284957507
Thus just like the EM6910 and other cheaper units the collar and and does suffer from overdosing and the excess pressures that are generated.
Thus they can dis-form and or fracture and even just shatter.
Depending on where you are and who the service agent is; they may be able to provide you with a new collar.
I know the local guys here in Brisbane do *a few changes but it does come down to parts availability and is the manufacturer provides as a part to the general public.
Best of luck.
As a new poster etc.. I would be looking at the cost of a new collar to buy some time so that you can research your upgrade path in full.