Defo haven't done it before. In fact...I've check in hk.... 2 Porsche specialist and main porsche distributor... dont even know what this problem is.
That's not to say they are no good... they can.break the car to bits and put it all back together no issue.... just that local consumers has nearly zero awareness of the IMS issues.
So I guess answering my own question... I'll order the toolkit also.