im thinking about making my box easy to remove so I can run two classes.. dose any body here leave off a trans brake with less than 3000 rpm.. im about 060/070 red leaving off the bottom blub at 3000 with no box.. would leaving at a lower rpm help me .. one guy I know leaves the line on a two step 1800rpm and a line lock.. is this some thing that might help me slow down the reaction time

That's pretty low, I would worry about inconsistency. Can you put a taller front tire on it?

I was racing both box and no box... I used a Biondo
adjustable button... either set it up so the button
is right for no box and the bottom bulb and adjust the
delay box to leave the button as is OR set the button
back to zero on the box(I left the button alone and
set the box to accommodate the button)... I could have
my box out in about 30 seconds.. unplug the box and
plug in a jumper then I had 2 switches I had to flip
to change the ground

why not just footbrake in no-box class???