Hi Jazz,

Thanks for the quick reply.
That is a great suggestion as you are absolutely right that I dont need better resolution than 0.01. In fact I dont need better resolution than 0.5. I know it sounds ridiculous when I see what people are aiming for in this forum but realistically everything I do melts.
Ice blocks come in standard sizes of 1000 x 500 x 250 and they are not perfect so essentially here I need precision is the edges to make them match each other to glue them together with water. The cnc would do just the sides the top and bottom will be done on a band saw.

Thanks again I will definitely consider the 2020 screws.

Vass