In General, it is not that accessories and such are not available for MT1 lathes, it's that MT2 is so much more common that it's easier to find the accessories CHEAPER. There are a few other advantages too. A MT1 drive center is usually smaller than the ID of the tubes on some pen kits, so that you can't really turn the cap on a FS Gent between centers with a MT1. You may find one that is big enough, but again, your gonna have to search, and it's probably not going to be a bargain. Also, most MT1 lathes use spindle threads smaller than 1"x8tpi, which means again that chucks, faceplates and collet holders will be either harder to find and more expensive, or will need an adapter, which adds cost, and possibility of runout. The smaller diameter of the taper also restricts the abiltiy to slide a workpiece back through a collet into the taper so as to support the end with the collet in threading and tapping operations.