Bitzenburger & nock receivers ????

[Old York]

I know there's a left-wing and then a right-wing nock receiver & clamp, what is a "TM receiver" ?

[Eric Krewson]

There was a early rest for compounds called the "TM Hunter". Arrows fletched for this rest needed the cock feather positioned straight down to go between the arms of this rest. The TM receiver positions the cock feather in this position.

[Fletcher]

It can also be used to fletch the cock feather at 12:00, Black Widow style.