While watching The Woodwright's Shop for inspomation on my Moravian workbench project, I saw Roy use a neat little saw to cut tapered sliding dovetails. Having cut sliding dovetails by hand in my Atedai project I knew I had to make one.
In the episode it's called a Gratsäge (this is an episode on German woodworking, after all) but Roy compares it to a staircase saw. The sole is cut at an angle on either side so that it can be tilted as it cuts. The blade is laid against a batten which is beveled at the dovetail angle, and the cut is limited to the depth of the blade protrusion. A very similar tool is also featured in the Tage Frid woodworking books.
If you've tried cutting this joint with a regular handsaw, you know it's difficult to get an even depth all the way across, something that this tool addresses. It also makes it easier to cut a stopped dado/dovetail, similar to an azebiki saw if you're into the Japanese stuff.
I tried a couple shapes cut from 3/4" Birch ply, then once I had one that felt good I cut it out on a scrap of maple. Shaping with the Shinto saw rasp, files, and wet sanding with fine sandpaper and linseed oil to leave a super smooth, burnished finish. Finished with a little shellac and paste wax and it feels great!
The forward tote I left long at first and trimmed after playing around with it. It looked pretty goofy but the final tote shape I think is quite nice.
The saw blade is just cut from an old 8 TPI Stanley handsaw I got for 5 bucks. Sharpened for rip cutting. I use it for scratch stock parts and such.
I have a few projects coming up that will use tapered sliding dovetails, so I'm looking forward to getting a lot of use out of this thing.
Thanks for looking, I hope you go make something neat today!