Nitrous plumbing A1A...??..

SOMEBODY STOP ME!!!..LOL...
So now I'm thinking window switch? I noticed MSD sells one for $188 and Summit sells what looks like the same thing in their own brand for $52...
I was thinking I would have it in conjunction with the low fuel pressure switch on the negative of the nitrous relay?..
If I'm behind somebody on the track I have a tendency to ignore the shift light and keep it to the floor till it hits the rev limiter.... From what I understand you don't want the nitrous on and hit the high rev limiter?... I imagine when it shuts off that it would nose down a little bit and pretty much signal me to shift?...
Right now I have my tach and shift light down low under the dash and have been wanting to remount at least my shift light again where I can see it. I don't have anyting working on the actual speedometer display in my car so I figured I could just mount it front and center there and use the light that comes on and off with the window switch for my shift light...