For what it's worth, here is my opinion of the Trap rest as it compares to Jack howard's, from what I can see.
The rest pictured seems to be of the same level all the way across.
Jack's rests were made with the outside feather vane being the highest, then each one lower going into the riser. This created a down angle going toward the arrow plate. After it is shot a while the arrow eventually wears a kind of groove or trough that the arrow slides through. This is a big help in keeping the arrow from falling off during the draw. They are tough and last almost forever.
Trap's rest seems like it could be used on both right or left hand bows. Jack's were not ambidexterous, in that a left hand rest had to be just the opposite. I have no idea how Jack made them but I assume he glued them together, then shaped the with a feather burner to get the base rest made, then used another burner to get the downward angle. I can see where he could have used the same second burner for right or left rests, just burn the left rest in reverse.
You might want to contact Charlie Lamb. He has been making Jack's feather rests and strings since Jack passed. Jack charged $12.00 for a set of one red and one grey rest. I don't know what Charlie charges, but he is not in it for the money and I am sure he would be glad to share any knowledge he has.
I have a few of Charlies rest's and they are just like Jack's
Trap - If you will PM your address, I will send you one of Jack's rest, and one of Charlie's, but I want Jack's back. I only have about 3 of his originals left.
It would be good to have someone else making these. Between Trap abd Charlie we will have a guaranteed supply,
I have a pretty large collection of bows and I use Jack's rest on most of them except for those that I have original rests for authenticity.
For shooting, I like the Jack Howard rest best of all. I would like to ary A "Trap Feather Rest". From Don's description, it sounds like an improved version.
You know the old saying, "Build a better mouseTRAP...