Lathe threading dial gear

This is a threading dial gear for the "chinese" mini lathes XXX290XX or XXX300XX or any that uses the same dial and lead screw.
The lead screw is 3mm pitch and the original gear is 30t. To make 1,75mm pitch threads i made this 28t gear that offers most of the useful pitches.

Resources:
http://mrjones.id.au/html/thread_dial_indicator.html
https://www.cgtk.co.uk/metalwork/calculators/threaddialindicator?lathe=harrison_m250_metric
https://www.printables.com/model/908445-warco-wm250v-metric-lathe-threading-dial-gear-30-t
https://evolventdesign.com/pages/spur-gear-generator