Not sure what you mean by "finishing one" but the twin solenoids looked like this ----->>>
I guess you could get a 3 position switch and connect it so that: off would be normal 5-7, on 1 would be 7 and on 2 would 9/10 etc...
The way I had it, if I had the 2nd switch on, I had 8psi and then at 4500rpm, the 1st solenoid would open and go to up 10psi.
or
Have the 1st switch flicked for 7 and flick the 2nd for 9/10...
Now I have the R32 actuator, I just push the loud pedal for more. It is easier to buy the boost solenoids than the 32 actuators though and it's fun having a play.