in my testing, i had no problems using a protractor and all my rings have no gaps, perhaps i just have a very accurate one. In any case, my question is this. I tested my sled using the calculations for an 8 segment ring, I know we discussed this in the other thread but for those here that want the background here it is. the calculator says an 8 segment ring miter angle is 22.5 degrees. I set the angle between the 2 fences at 22.5 degrees and ended up with 16 segments. Easy enough to fix, just double the angle. but I was thinking too that the segment edge length is 4 5/32" for an 8 segment ring that's 10" in diameter could be wrong. my question comes here, since this length is based on specific angle and presumably, a specific method of measuring and cutting. if I double the angle to get the number of segments to work out. the measurement between the stop ( which is a separate stop in the other slot ) is vastly different if you measure along the fences angle using 22.5 ( the original calc output ) vs 45 degrees ( the now doubled angle to get the number of segments to come out right ). you didn't state how you measure the segment edge length. if the measurement is strait across ( 90 degrees ) from the blade to the stop, then it doesn't make a difference. but if the 4 5/32" is the measured using the angle of the fence from the blade to the stop, then it's a big difference and confusing, since both fences are relative to each other and don't have any specific relationship to the stop. i'm assuming, since the calc says use 22.5 degrees and measure such and such amount, then that 4 5/32" is going to be wrong using a wedgie sled since that measurement is assumed to be using the 22.5 degrees referenced to the blade and using that angle across the blade to the stop and will always be consistent. I hope you understand, it's difficult to get this across without drawings. in fact, sitting here visualizing the issue, i see that i'm making it too difficult. if you draw a line 90 degrees to the blade, across the sled left to right, then the 22.5 degrees the calc is spitting out is referenced to this line and makes sense why you need to double the angle ( 22.5 from line down and another 22.5 from the line above ) so if you make the wedgie as even as possible ( from a half above the middle and half below ) then the segment length measurement comes out fine. if you didn't want to do this, to take advantage of the somewhat funky nature of the skewed nature of primary/complementary cuts, then you could still make the measurement work by setting the original angle ( say 22.5 degrees ) to the blade, measuring and setting your stop, then setting the fence angles with the wedgies.