Originally Posted by HackMax  Shouldn't the springs be on the inside of the block pressing out against the threads. I think you are working WITH the threading instead of against it. |
I agree with this statement, the design pictured dose not take up any Backlash it just uses the Springforce against the second Nut.
Moving the Springs to the inside of the Blocks would improve the design, then you will be able to adjust the screws to take up the Backlash.
Still Nylon Blocks are not Ideal, they are a bit rubberish and when under load will increase friction and sticktion, so you may still end up with some Backlash.
But it would be far less then the 9-10 thou you are getting now.