On Dec 20, 5:29*am, Tom wrote:
"Some operators thread a tost link and a Schweizer ring on the same
end
of the tow rope. "

Two tow rings on the end of the tow rope makes it heavier, and will
fly lower behind the towplane making it more likely to hit objects on
the ground.

Tom Knauff

There are lots of really neat stuff in the Tost catalog - including a
tow rope retract winch. The late Fred Robinson installed them on his
Pawnees. The resulting increase in operational efficiency from
shorter landings and taxi-backs equaled a third tow plane, he said.

Tost also had a really neat connect/disconnect system which allows
quick change of rings and weak links. This also adds to efficiency in
that the "crawl under and hook-up" protocol can be done before the tug
arrives with the rope snapped onto the weak link/ringset leader in
seconds.

Finally, use only the correct ring/ringset. Any other combination is
a significant risk not worth trying for a bit of convenience.