Polyleader experience anyone?

I'm thinking of trying some Polyleaders, Airflo or Cabela's, for
fishing the higher water flows in the Upper Sacramento. Polyleaders
come in the following: Floating, hover, intermediate (1.5"/sec.),
slow sink (2.6"/sec.), fast sink (3.9"/sec.), extremely fast sink
(4.9"/sec.). Flies for this setup are Stone nymphs 6 - 10, and
October Caddis Pupa 6 - 8.

I use a Teeny T-300 for Steelhead fishing on the Smith River. It has
a sink rate 6.5"/sec., this is way to fast a sink for the Upper Sac in
my opinion.

I have also thought about a sinking Steelhead leader and
Polyleader/Steelhead leader combination to extend the length of the
Polyleader, all this ends with a 4 foot tippet.

My other concern is hinge effects when try to cast this creation.

Any thoughts appreciated.