My machining skills
If I just keep things clean and tidy, working on the lathe becomes so much more productive. However, it’s just so difficult to do so.
I get distracted and misplace stuff in the mess all the time. I need some sort of tool management or something.
Anyways, progress on the Rotary-axis assembly is coming along nicely.
I’m thinking of using an angle bracket machined a bit to fit around the lathe spindle bearings, and weld a piece on the base to get a nice ridgid structure to mount the assembly. Photos to come. The cardboard mockup is embarrassing to show. 
But carboard is your friend.
I’ll have to work on my welding skills [well, learn some welding skills].