worm + gear + reinforced with metal screw

I needed a very strong and small worm screw + gear kit...

I worked very hard to succeed, if I can make you benefit!

It is because when you print a small worm gear horizontally, the teeth are fragile, and when you print it vertically, it is the main shaft that gets fragile.

So I had an idea... I designed the worm with a hole so you add a metal screw in the middle.