Here's what the chocks look like on my C skeeter. Notice the adjusting set screws for runner alignment. Very cool, but seems to be a lot of hours in front of the milling machine to make these.
Here's the glued up new plank for my C skeeter. Internal ladder structure is tapered and top and bottom boards are a constant 1/2" thickness. Overall, it is 2-1/4" thick x 13" wide in center, 1-3/4" thick x 10" wide on ends.