With the G-51 , stock - you get about 3/4 turn between a solid 4 stroke & a solid two stroke .
Ive found the reliable way from zero , is to wind it till its in the solid two stroke , then back 1/4 turn . On something like a 12 x 5 top flite wood .
The 11 1/2 X 5 1/2 Bolly 3 blade, a bit richer for a more relaxed run - less two strokeing . Usually use muffler pressure .
The First, on a 10 x 6 Tornado Black 3 blade , you can fine toon it for ' the switch ' from halfway up ( & down ) the loops , through to 1/2 way through the upper loops , in a 70 Oz plane .
The Bolly it'd just be nibbling the 2 stroke , in places .