True - but the delay box will get back fed and will activate the lock out on the box - so you have to waite to use the trans brake - plus the NSS is not rated for 30 amps - which is what a trans brake can draw
I was thinking somewhere in the diagram I was talking about there was a diode involved to prevent that, with my T-brake the button will activate reverse in neutral also so you would just have to remember to put it in neutral and use the T-brake button if you needed to back up on the starting line area, in the pit area it wouldn't matter you just wait for the delay to drop out.