Bob, I am always impressed by the stuff you complete, or even undertake, I probably wouldn't want to try in the same situation. I hope that remark isn't offensive to you.
I have a couple of dovetail jigs I acquired over the years, but they collect dust. I went as-far as to read the instructions, and played with the pieces, to see about using it/them, but I never had any project where they would work for me; that is, where I needed something like that, done. I have used the Panda Kitchen solid-wood knockdown cabinets to make a kitchen and a laundry/pantry, those come pre-cut w/dovetails for the drawers. I like the solidity you get from dovetails, and I always glance at them when I open a so-equipped drawer.
About your Japanese draw-saw: whenever I've used mine, I'm always impressed with the ease it cuts, and how its use saves me significant work. I think an oscillating multi-tool would probably work similarly, but breaking-out the manual draw-saw and using it makes me happy to 1] have one, and 2] be able to use it. I bought mine at International Tool in Davie FL (see below).
Have you ever-been to International Tool south of I-595 at the -595/Davie Rd. exit? It's in Davie, and not to be confused with Davie Blvd. exit off I-95. They have a very well-equipped showroom, probably one of the biggest Milwaukee displays you'll ever-see. They specialize in woodworking tools both manual and shop/powered, hand-held and floor models. They carry FEIN and Metabo, DeWalt, Porter-Cable, Hitachi, and others. They have mechanic's tools too. If you want to drool over machine tools they have Delta, JET, Grizzly, and more. A little further down Davie Rd. is the Flashback Diner, a family-owned restaurant that serves deli-sized portions without the deli pricing. It's a good place to eat if you make the trip. I know the family, they have another restaurant across the street from Gulfstream Racetrack, the thoroughbred horsetrack in Hallandale Beach FL.
Take a look at the International Tool website and you can see what their inventory is like, they deal a lot with the yacht and marine trade. Their warehouse is behind the salesroom and I'd guess is probably six-times the size of it. I estimate the salesroom is the size of a small supermarket. They used to do tool repair on-site but about a year-ago they began farming it out. You used to be able to get good deals on used repaired tools there. Rudy, the counter guy was helpful, but now he's another counter salesman.
Over the counter sales area is a picture of a older guy, partially-bald, that would be Louie Wild, he of Wild Electric in Hollywood FL. He was a smaller version of International Tool, they bought him out and until he died, he was one of the counter guys, you'd never-know he was one of the owners. Louie's store was about 5 minutes from my home, and he never air-conditioned it. Rumor has it he did that to promote customers to come-in and buy, and to leave. I bought my first cordless drill from him, a DeWalt 12 V which is still functional, but of-course, the batteries have to be hand-built, as they're obsolete now. Anyway, Louie was a character, and his squinting visage stares-down on the customers to this day at the International Tool store.
When gluing dovetails, I always use plenty of carpenter's glue and clamps, and use a damp rag to wipe-off the excess 'squeezed-out' after clamping.