I build all my risers symmetrical 14-15" fade to fade depending on bow length. I place the shelf 1 1/4" above the centerline of the bow making the bottom limb slightly shorter, this creates a built in positive tiller. I only run the belly glass up the riser ramp. I like the looks of the steep ramps but it does make for difficulty getting a good glue line especially with .050" fiberglass. This is just my 2 cents and what I see most In Hill style bows.