Quote Originally Posted by russell View Post

I'm wondering what the best option is for the Z axis. There seem to be three options:
1. Lead screw at the side as with the CNC Fusion kit. Don't really like having the leadscrew so exposed.
2. Lead screw above the machine as in the Hoss conversion. However there is very little space between the motor and the column.
3. Lead screw behind column. This seems to be the neatest solution but I'm a little concerned that it may encourage the head to tend to tip and give jerky motion.
Any views on the best solution please.

Russell.
Hi Russell,
There is one more option you haven't listed which is better:
Remove the rack (cremaillere in french) and place the lead-screw in the slot between the head and the column. ;)

Laurent