According to the takadai book that I have, the used takadai that I bought from a friend needs one more accessory to be complete. The raddle is used during set-up to keep the strands separated and in order before they are wound onto tama and placed on the koma. This takadai may not even have come with a raddle, since it is not 100% necessary for braiding. Having set up for two braids now, I can confirm it is optional. It does seem handy to have, though, so I decided to make one.
Thw raddle is the bar across the front of the takadai that is basically a row of pegs. I bought a piece of maple, and cut it down to the size I wanted. Then I drilled a line of 3/16″ holes along the length of the bar using the drill press, and rounded the top and side edges with a router.
Next, I cut a few 3/16″ diameter dowels into 1″ lengths. I rounded the ends of each peg with a Dremel grinding stone, and then glued one peg in each hole.
After attaching a couple of small blocks to the underside of the raddle so that it can be mounted in the slots of the outer arms, the raddle was ready to go.