I did a little more reduction this morning. My basement shop is 45 deg. this morning and standing on the concrete floor really gets the cold in my old bones.
Anyway...My initial reduction was to make the limbs 3/4" thick. After I get it down to that point I floor tiller check to see if there is any bend. At this point there rarely is but I always check just in case. Next I thin the limbs to 5/8". To get my line down the side of the limb I first mark 5/8" at a few points down each side of each limb then draw a line. I use my fingers and a pencil to do this...
...on all 4 sides. you can see the 3/4" line and the 5/8" line here...
making sure I follow the ups and downs of the back with the pencil line...
then I start reducing the thickness with a farriers rasp using the faceted method, first down one side of the limb, then the other side. not sure if you can see these facets in the pic but there is a peak down the center...
then I reduce that peak with the farriers and clean up the tool marks with a scraper and center the crown of the belly down the center of the limb...
to be continued...