[Jatta Raso]

i got the hang of it like this:

take off:
fine pitch
radiator 50-70% (what takes not to reach 100ºC)
engine 20%
->fire engine
warm up (do your check list in the meantime)
->engine to 30-40% (start moving, watch the temps and adjust rads accordingly)
->if no engine stuttering: step on it

airborne
using your throttle (but not bellow 80%) and climb angle to keep the revs bellow 2800rpm, start a shallow climb until 1000m; go in steps if you have to; always trim to get just your intended angle; don't wait for the stall to interrupt the climb, anticipate that

once at 1000m trim for level flight, attain your max speed (by now i close my rad about to 70-80%, always watching)

climb to 2000m using same process

once at 2000m trim for level flight, attain your max speed

start a shallow dive and change to coarse; your revs should jump to near 2100rpm
->throttle to max; use the small speed gain of the dive to help the spinner pick up revs
once at 1600m you should have at least near 2300rpm which is by now a stable engine operation, that allows for an efficient rev pick up; at coarse pitch you must not fall bellow 2100rpm or you may need to go back to fine pitch

start a gentle climb as you should have enough speed for such
climb to 3000m
once at 3000m trim for level flight, attain your max speed; you should be hitting the 2500rpm soon which is the optimal situation you're seeking

if serious trouble persists, maybe i can drop a vid of it...