Do you have a plan you could post? I'd really like to see how your mechanism for adjusting your rollers work.
Sorry, I don't have a plan that has been drawn out. I made the rollers first and then made the frame to fit around it. It took me awhile to understand how it was put together only by looking at other mills.
Hopefully I can explain it better. On the end plate I drilled a 3/4" hole to accept the bronze bearing that the drive roller will set in. I also drilled a 1 3/4" hole using a bi-metal hole saw. Then I turned the knob down to just under 1 3/4" so it could fit inside the hole. After that I drilled a 3/4" hole into the knob so that another bronze bearing would fit. This hole was drilled 3/16" off center so that when it was turned in the frame it adjusted from around 1/16"- 5/16". Keep in mind that both end plates are identical. The set screw on top is what keeps the "dead" roller in place.
Are you making the second roller spin?
The second roller only spins when the grain comes in contact. It is considered "dead". Because they are both knurled it will pick up the grains better and hopefully have a great efficiency rating. I know Yuri posted that he had an efficiency at around 80 %. But both of his rollers spin together.
I hope that this helps. Thanks for the interest. By the way, I might even draw a pattern for this. Not sure when. I am a very busy man right now. That's why it took me a month to make this thing.
OK, I guess you have adjust both ends seperatly and keep measuring tthem the same then? I might try this method.
My current grinder is giving e between 85 -93%. Love to hear what your new roller gives you.