Just a couple of general things. What does the manufacturer's manual say about quick turnarounds? Do you need to motor the engine before fuel introduction? White smoke is generally unburnt smoke from the previous cycle, whether it be flight or an aborted start cycle. Smelly and on a cold day, very interesting if it lights up! But keep the thing turning. Lastly, do you know the the actions required for a hot start, hung start etc. off the top of your head. Lastly, fuel admission values are generally minimums, not maximums. A lengthy blast with the starter motor will normally bring down temps - but you have to stick to starter cycle limits. I'm sure you'll be OK, PT6s are tough but they do appreciate reasonable batteries.