Re: Yelling
TomD
"In brief, for the mouth you have to have laid out where it will start and end on both top and bottom, highly dependent on the blade size. (If you do a Japanese blade, be sure and mark an approximation of the ura as the back boundary, leaving it more forward than you think you'll need. But, you say, the ura's on the opposite side of the blade from the bevel; to which I reply, there's a small ura on the bevel side, too, but you wouldn't notice it until you tried to fit the blade to a flat bed.)"
I'm sure you didn't "miss" anything, I've seen your work, but I would add:
The blade needs to be marked 1/3rd withdrawn. It is a huge amount compared to what I had thought. As Pam says, there is a lateral concavity on the plane blade, so even if one were not planning to ease up on the blade position the blade is actually thinner than the edge one is marking from would suggest. Thin in the middle thicker on the sides. My deduction is that the lateral convexity is at least in part there to make chiseling the ramp easier since one is fitting to a curved surface, in the ramp's case laterally convex, which means the chisel is always cutting to a high point which means the chisel can take the fine shavings one wants without the problems that would normally present itself when making very fine shavings across a wide expanse. This mean you do not need a wide chisel either for tuning. None of this applies to western planes where I do feel the float is a good deal, and I made two. I plan on making a lot more before converting my Beech.
"Then with a drill (press), start from the bottom, on the line, and drill straight up, it helps to drill through to the top. (This could also be done with a mortising chisel, probably very narrow, but it's easier and less messy to use a drill.) Then chop out the full mortise following the lines, the chisel will typically be a wide mortiser/chutaki. The holes you drilled will help guide you."
So depending on the type of plane some will have near vertical mouths, and others are angled back. So one accommodates for that with the drilling. In most cases the accuracy of the drilling is not that critical since it there is plenty of space. One gift of fat blades. Some planes have fancy ramps that contour to the bevels. This is much more difficult to do because the mouth is then miniscule. It sounds impossible to make a ramp by hand to say 43 degrees, but it is easy, because one simply joins cuts from the to, with ones from the bottom, when the blade is then blacked in, it will be pretty much perfect. The small mouth makes that impossible, so it is a lot more work. It would be pretty difficult to cut in the closed down mouth with a float, since it doesn't have anywhere to go. I mostly don't drill I usually do it all with the chisel just for practice. But as Pam says, one could even use a mortising machine, and I keep intending to get around to it.
"Then saw the edges of the abutments with a small saw and clean them out using a 3mm (1/8") paring/bench chisel, adjusting the depth by fitting the blade. I try to use it bevel down where possible. Also, making a 3mm single tooth float/scraper helps to make them level, but you really don't have to use this since pencil on the blade edges will mark the high spots."
I try to saw these abutments perfect from the saw. I invested in a saw for that, but actually had good success using the LV flush ryoba which is a very clever little saw with lots of unexpected uses. I got a lot of feedback on that saw when I was doing Toronto seminars, they really should let it out more in the catalog. Because it is flush it will simply float off the mouth, and it can be tensioned to the abutment top point marked on the block. It pretty much just lays the saw line in there. The abutment saw is better as much as anything because it is a little better dimensioned for the work. If you don't come right off the saw, then you can run into one of those table leg type situations chasing both side to the same level, and then the ramp is too loose. Of course if your chiseling is real good you don't have to worry. But the cut from the top is against the grain, and one can't cut from the bottom with the tight mouth. So if one can get the line from the saw, it makes it easier.
BY the way. I was looking at Scott Wynn's very handsome book on planes. And the diagrams he has in there are not the way I was taught, or like the tools I have bought. They could conform to other brands. That said it is all just plane making. The first Japanese plane I made, I still use and it was just terrible compared to what they say one should do. Works great.