Ok this is weird i am asking a question LOL. I have always used the 8 and 7.5 mm venturi's swapping through out the day never having to touch the idle. Now I put my PTM in a buggy and am going with the 6.5mm does the insert affect the idle screw or not? Meaning should I put the venturi in then close the slide and do the 1mm gap or leave it how it was cause my needles never need played with.