Or if anyone has a spare worm they're willing to sell that's in good condition then I'll buy it. Here's the wear on the RA one, you can see it's quite uneven wear:
https://www.youtube.com/watch?v=tU9urNuk1gg
The RA gears were starting to squeak which is why I took it all apart for a service. It's gonna get a good clean up and then superlubed with new bearings.