If you could please, I need the measurement of the length of the 'intake tract'. I need the upper and lower sections measured indiviually. Ideally the inside 'long' wall would be measured, then the inside 'short' wall, add the two numbers together, and devide by 2 to get the effective length.
It is impractical to measure the interior though, so if the 'long' and 'short' exterior are measured, the number should be close enough. I don't have any lowers around, or I would just do it myself. I do have a spare 42 & 50 uppers, and I can tell you that the 50mm upper has runners that are 1 inch longer than the 42mm. An easy way to do this, is put a piece of tape along the runner from end to end, make sure it stops right at both ends flush,.....then peel it off, lay it flat and measure it. Thanks!!! - Josh
