Manufacturing defect confirmed!
It's about hub integral key.
Is only half long then normal.

(They doubling frontside integ. key machining operation)
(I have all #35 Extreme clutches with this.)
(#40 Extreme was Ok)
(#35 Furry Ok - from Hilliard)
I warn about it Hilliard and Mfgsupply.com 3 months ago.
Mr. Gary Putmann acknowledge Hilliard defect.
(He submit to send me new)