Hi,
thanks for your suggestions. I already gave a thought to those Japanese boards, or bottom row styles that reassemble them. The problem is though that I seem to have big hands. Well actually I don't think that they are that big, but I just can't press alt with my thumb comfortably. With JIS the spacebar becomes smaller, but I am not sure whether those modifiers are near to thumb or not.
Also a drawback is that it is pretty hard to grab a hold one. Or really expensive.
I will let this slip for now I guess. I just customized SpaceFN to my needs and realized how many possibilities this single key offers. Maybe that's even enough for my needs. Or I will build a custom keyboard

Although according to the time you can spend doing this, my girlfriend would probably kill me
