Hi there =)
@Zoom: Price for 5,25" should be max. 30EUR (w/o Tax) and 3,5" version 25EUR (w/o Tax) as far as I can see it now. It will be cheaper than Kama Meter for sure.
The holes for 3,5" and 5,25" versions is matching the standards. What exactly do you want to know? The knobs?
@Zenphic: We did not plan any brushed aluminum version, because this has to be transparent =)
patrock84: Yep, looks nice and I like your sigi at@HWLuxx

More details will follow.