Hi Phil:
Maybe your Weiss machines are delivered in better condition than my Busybee but I think they are all built by the same factory/factories in China. I found a fair bit of grit mixed with dirty oil on the internals of mine. So far, I've disassembled, cleaned, lubed and reassembled the compound, cross-slide, tail stock, 3-jaw chuck, and 4-jaw chuck. I recently bought the gear oil for the headstock and apron but haven't had a go at that yet.
Do your chucks have the same mount as mine?
View attachment 137723
The bolts pull the chuck onto a tapered mount. The large end of the opening on the chuck is just about 50mm. BTW, my 3-jaw goes on and off the lathe very easily. But with the 4-jaw, I have to use the nuts to pull the chuck onto the mating taper. To remove it, I need to bump it with a brass hammer (several times) to get it to come free. I haven't tested the fit of the face plate yet.
Since I'm yammering, I found a fun accessory for storing the change gears. A free design is available on Thingiverse and a local guy on Kijiji agreed to print it for a few dollars:
View attachment 137724
It is actually designed for the Precision Matthews 10 inch lathe but it works perfectly for the my gears. The empty slots are the gears that are currently on the lathe.
Craig