Hello, I'm wondering which measurements are most correct when it comes to cutting tubes lengths and applying the miter print outs. Do I need to be initially cutting the tubes to the center-center lengths? I had a bent seat tube and am using the Z1 and Z2 dimensions to measure from the center of the bb to the center of the bend. Then from bend center to seat coller. Same questions but with bent stays. I tried to vary the curvature to see if the length dimensions changed and it did not. I'm sure I'm overlooking something. I'm assuming from there I put the miter template paper on the tube and measure the miter-miter distance.