The 120 is a simple machine, I have about 1500 hours in them and always start with the boost pump on, but watch the temp as we all know, if you are expecting a hot start a the throttle will need to be wound off ...perhaps alot....it is easy to go tooo far and shut it off.
Most normal starts I found requied a gentle increase to get the T4 to around 700 deg which is preffered on start, the secondry nozzels don't seem to accelerate it enough in some cases.
I would think twice about ballest in the machine, it ain't that bad. and the vmed info is as you probably know only in the flight manual section 7 if i recall. Best bet is to find some ground power and have a play.
Good luck