I bought a 2nd-hand Ashford table-top warp mill and just used it for the first time. With no warp on it, it spun beautifully and smoothly, but as I added more and more threads to my warp it started to stiffen up. By the time I finished warping (436 threads of 8/4 cotton, <5 yards long) it would not spin freely at all (I could turn it but it was very stiff). I added some WD40 at one point (hope that wasn't a mistake) which helped a little but the real problem seems to be that as I added more threads and the warp got tighter the cross bars were shifting a bit and pressing more and more on the center metal rod making it harder to spin. I'm wondering how I can avoid this, and if I am just warping too tightly?? How tight should my warp be on the mill? I was trying to use only as much tension as needed to keep the threads from slipping down the frame. I also wondered if perhaps it had something to do with how I distributed my warp across the height of the mill (which was a bit uneven).