I have been in touch with K&M, initially they said that the holder doesn't fit the iPad mini 4 so I pointed out that I have an iPad mini 2......... waiting for their reply to that one.
I agree that K&M have a great rep for quality (and I have a few of their products), this is my first experience of their customer care so the juries' out for now.
I do have two of the full sized iPad holders and they are fine, being bigger then are a bit bendier but more importantly, they don't put any pressure on the screen when you insert the iPad as the claws have a chamfered inner face unlike the one for the mini.
I don't expect any joy regarding the cost of having my screen replaced, with with K&M or Thomann and, now I've modded the claws I can't reasonably send it back. But, having modded it, I don't expect any trouble in future (though I will be more careful when putting the iPad in the holder).