When you have different ends per inch, how do you use the centimeter raddle correctly? I know the goal is to have it centered on the raddle, but how do you correctly space them. For example, 38 ends at 40 epi each end and center threads at 20 epi EXCEPT one thick supplemental warp thread every so often. For the 38 ends, I lay the threads in as 6, 8, 8, 8, 8. Then I lay the 20 epi threads in as 4, 4, 4, 4, 4. Except when I got to the one thick supplemental thread, I wasn't sure what to do. I suspect since it's supplemental and "lying on top" you just put it in a slot with the other threads. I didn't do that and, instead, counted it as one thread along with three others but now the side to the left of the center point is longer than the side to the right.
Also, what do you do in cram and dent when you have bunches of thread which may not equal an inch. How do you mix and match? Thanks for your help.