That's cool, thanks!
I don't bell in the powder measure yet but when I start I'll definately be doing this. Nice trick. This weekend I did a bunch of brass prep and was thinking of ways to help here and there, but so far nothing has worked out.
My first idea was to mount a primer seater on the frame rather than on the sub-plate. My primer seater always gets powder balls (when using ball powder in the .223, pistol doesn't have this problem) under the primer seater and holding the shuttle from closing all the way. If a seater stem was mounted on the frame the crud would fall through the hole each time and stay clean. The problem is in order to keep the primer up you'd have to have a bushing on the sub-plate and the seater stem would be smaller than the diameter of the primer. I didn't like that idea, so the entire thing got shelved, but if the bushing floated and helped seat the primer it would still work.
I might try to find a lathe and see what I can come up with.
The second idea I had was to use a stem from the Dillon primer swage tool and mount it to the sub-plate where the primer seater goes.. When doing .223 brass I could just deprime, swage and out. Then trimming and deburring off the press and back for loading.
Sorry, no complete products or videos, just a couple of ideas I've had.