I will add pictures and a functionality report later. Anyway, for a short time there were Chinese AK drums modified to fit a regular SKS rifle. I finally got one and have wondered for some time whether or not these drums work well. I have also had regular AK drums, Chinese and Romanian and have been pleased with both. The Chinese drum is not a copy of the Russian drum and has some unique innovations, those being a "door" on the back of the drum, and a ratchet assembly for the drum mainspring. The drum loads more quickly than other drums, and can be stored loaded with the tension off of the spring.
Well the main question about the SKS drum is whether or not it will work. So far it seems to be easier to change than most of the aftermarket add-on magazines, provided I hold the bolt open when I install or remove the drum and the weight loaded is considerable, but not excessive. The drum, when loaded easily makes a rattling sound so it may not prove that practical.
I want one of those