Just got back from the field a few hours ago after tweaking my needles for optimum midrange/transition on an old Brison 3.2 with a brand new carb. Burble is almost negligable except at very high idle, transition is nice and smooth and it still starts rather easily which works for me Pe has a good and easily understood mini tutorial here that always works. http://www.prme.nl/forum/viewtopic.p...6758bf90c1424e Scroll down to the midrange department