Yo Tom, Been 20 years since I cut up a deer hindquarter into steaks. Now I just cut the three main muscles out and trim out the rest of the meat for grinding. When I did cut bone in steaks, another person held the leg in place until my saw got to close their hand or they no longer could hold against my saw motion. Most of the steaks were not the full size of the leg as not all of muscles were left on the bone. I will admit, it was work. The venison steaks were nice to have, but I much prefer the burger and pastrami from venison over the steaks.
The pork shoulder is a different story. I have never tried cutting one up into steaks. Here is what I would do. If you have a work table you can use, set up a secured back board to the table so the working surface looks like a kitchen counter top with a 3-4" backboard that sits against the wall. I hope that makes sense. The meat should go against the backboard and allow you to keep the meat in place while you saw it.
Although the saw-z-all is probably quicker, I would still cut the meat into steaks with a hand saw. You are less likely to hurt yourself with the hand saw. I have first hand information on hurting myself with a saw-z-all.
BTW, I typed this post with nine fingers........
Juggy