what did hobie sorrell mean?

hobie sorell wrote something in the description of his Guppy plans
that is perplexing. I'm almost sure I know what he meant.

"aileron hinge bushings are made from a 1" plastic pipe T.
turn them to 1"od and cut to 1" lengths.
they are adjusted for tightness and made installable by cutting a slot
in them, as required, to make fridicative."

what the hell is the word fridicative?????????

this term is not in the oxford english dictionary so I'm assuming it
is an americal colloquialism.
can any of you guys give me the american meaning of the term?

(and, groan, I know I'm vulnerable to you pulling my leg)
Stealth Pilot
Australia