When doing a 2 piece, I leave the high side of the tenon 2"s and the low side 3/4".. or close. The 2" because that is the width of my knife grinder and it makes it easier. It can be many widths I suppose. The total width of the relived area on my bows range a bit from one model to another simply because it works in my favor to run the upper part of the socket to about the center of the throat.
The minimum is about 3"s of total relived area.
Not to draw light away from Crooked sticks build along, but just thought I might throw some helpful tips in there for anybody interested. It looks to me like he is doing a good job.
I also quit using the tooth picks several years ago.. not necessary.
After relieving the sides, I cut mine in two, install the end caps and then rough shape the top and bottom individually. I then use a block of micarta wider than the lower tenon and attach adhesive backed 120 grit to the block.
Carefully working my way all the way around, I sand the sides evenly so as to remove any dishing. I prefer my sides to be slightly tapered, but from front to back, my tenons are with in .001 of parallel. Not real difficult, just takes patience. The tapered sides will make disassembly much easier.
Keep up the good work CS.
BigJim