Thanks for the reply!
Actually, the tailstock has an MT-2 taper. That's pretty handy because there's a fair amount of accessory shafts with the /mT-2 taper. Apparently, the spindle of the lathe head is supposed to have an MT-3 taper on the inside behind the chuck. If I use a faceplate on the spindle instead of the chuck, I can use MT-3 accessories, or just remove the chuck and use an MT-3 collet system.
I'll keep the pew tag in mind for future posts of this kind.