I have a model 4-1200 speedster. It weighs 641 empty. My engine is s/n 204 which is the oldest version with 572 hours.
The top speed yesterday was 105 indicated level flight 3150 rpm it was a little bumpy so I didn't hold it there long. Could have crept up if I had smooth air.

Should I pitch for 3300 level flight? I'm new to the adjustable pitch family.