Alan, I used the Emil in the thread above so may just be a Christmas thing. Carsten was very quick to reply to me so may just be away.
G79, for what it's worth, I mounted mine so the lever sits in the slightly higher position. I found that in the lower position there was not much space to get my fingers around the lever to be able to grab hold of it. I have never found it gets in the way. Mine was build mainly for road use and I can understand for the academy cars that the more the handbrake is out of the way the better, so mount low. I took the view that if I did not like the high position it's not much work to go back in and change it. I don't remember having a problem with the micro switch but a multimeter will tell you what's going on in the switch.
On IVA, IIRC it is important that the car is seen to be built from all new components. When I built mine (2012) I wanted to do something with the underside of the wheel arches to try and reduce starring through stones being thrown up. CCs advice at the time was that would be fine as long as it still looked like new. In the end I masked them up and sprayed a few layers of stone guard on the inner surface which did not raise any comment. Re the handbrake, might be worth asking CC but I expect their response will be to keep as stock as possible to get it through the IVA. Given yours will be the same as mine and Tim's, it will either simply twist off or it won't, and if it doesn't it is a relatively simple job to cut it off. Of course once you have cut it off you can't put it back on!
Regards
Mark