Quite the opposite.....
We were advised by BMW that mounting to the caliper bolts would not present a problem with warranty, as the caliper is essentially a user accessible item. We supplied longer stainless steel bolts for this purpose.
We were told categorically NOT to mount anything on the end of the rearward torque arm bolt, as other manufacturer(s) have done.
Our mounting method was not the reason we recalled our rear hugger, it was something to do with the carbon fibre element.
When we offer this item for sale again in the New Year, whether it be Carbon Fibre or injection moulded plastic, it will most definately be mounted via our patented arm.
Purchasers of our rear hugger will be provided with documentary evidence to support the above advice.
Cheers
Dutch