Unimat SL Thread Cutter

Unimat SL Thread Cutter.

Recently bought an old Unimat SL mini lathe, I think a mk4.
You can purchase a thread cutting attachment addon, if you can find one but they ain't cheep

So I made my own DIY vision.
(This is my second try, my first attempt worked but cut left handed threads doh!)

You will need a 8mm Linear Rail Shaft Rod with Block Support
(something like this eg https://amzn.eu/d/cejVDXS)
Plus drive drive belt you can cut to size

Pulley came from *GT2-belt-pulley by imaicom
https://www.thingiverse.com/thing:4613338

Cogs generated using Modulus Gear Customizer by SciTeacherEd
https://www.thingiverse.com/thing:2572111

A attaches to motor spindle + washer where screw hold it onto shaft
B attaches to main shaft + Spacer file, or some nylon washers so you can bolt it together
C attaches to screw shaft + washer each side.
D attaches one to each end of the Linear rail, glue or grub screw in fitting is tight

You can then manually turn the shaft to cut