Rear strut tower reinforcement for true coil over

[MOTK]

As per title how necessary is this on the Z4M coupe?
Is anyone running a proper coilover without reinforcing this area?
Those that have reinforced, anyone done it without a cage, what solutions have people used?
The intrax kit I will be getting has an RSM design similar to the Rogue item with a substantial reinforcement plate, could this be enough? I've spoken with them directly and whilst they advise there could be an issue they have never heard of such.
TIA

[GPower]

I would like to hear any input on that as well.

Although for our limited production car, unless you do it yourself, chances are you won't find any aftermarket parts.

[MOTK]

Thanks for the reply! I was beginning to wonder if there was anyone here
Spring rates will be fairly soft for street use, with race rates reinforcement has definitely been advised.
I know for a fact there are cars running out there with a full coilover in europe without reinforcement, but I have no idea on miles and usage, anyone on here??

[Finnegan]

I'm only aware of one instance of this and that was running a cage. Those who have tried w/o a cage?it hasn't been pretty.