RE: Welcome to Club SAITO !
Actually its true of any engine, thats the reason you see guys up end their model at full throttle and set the HS needle with the nose high. Fourstrokes are actually a little more forgiving in this department drawing fuel better than some two strokes with too large carbs. My preferred method is to set the HS needle with the tank half full about 100 rpm rich, then I don't worry about it too much. Somtimes I do it with the tank half empty.[8D]
While I'm here I'll splain the difficulty I had the other day with the .65, I hooked up the Saito fuel filter that I hadn't used for a while and it must have had some sludge in it that collected around the HS needle of the .65. I disassembled the carb and blew it out. Soon as I get a chance I'll re-run it. Now I have the correct picture here.