Joe90's BIG RAT Build.

[JAZZCNC]

Yes, as you say Joe Harris's videos show simple routing of Aluminum is doable if high precision not required. However looks from video that he actually used 15mm+ spacers under his Z bearings and flat plates.

Neale, presumably you have to recess one plate for the ballnut holder, and the other for the BK/BK bearings....or go another way? What am I missing?

Just because Joe did it that way doesn't mean it's a good way. He did it because it was the easiest way, I'm telling you the other way is better from experience. Those building have to make there own minds up which to route to take based on there own abilty's and equipment just like Joe did.!

This might help with the confusion.