Max motoring is the way to go! Especially on the smaller turbines. Be careful however to become fixated on "cool starts". A perfect start is where there is the correct balance between; start temp, eng rpm and time taken to ground idle from when the fuel goes in.
Eg: at 20 sec 600 deg C 30% N1 and a couple of other checkpoints. On the older turbines you could find these values in the maint manual. If I remember correctly the TURMO IVC on the Puma helicopter had a flt man limit of 600 deg C min for a cold start.
The thing is jets are air cooled so you need to pump air in to cool them - a cold slow start can be very detrimental. Your temp indication might be low but as there is insufficient airflow (low comp rpm) certain components will be cooking.
Trouble free starts to all..
