great insight, Ian. I'll try that next time.
here's the easiest way I've found to untwist tangles: with line on the dangle at the end of a cast, hold the rod with two hands (upper and lower grips) horizontally out in front of you. Spin it 15 times along the rod's axis, so that the reel and line rotate around the rod. If the tangles are gone, voila. If they're worse, spin it the other direction. Done. Takes about 10 seconds.
on the cast, you can also slightly control a shooting line with the index finger of the top hand. Not quite a "ring" as one would make with the lower hand fingers when shooting a single hand rod, more like a "bench" to direct the line towards the lowest stripping guide
CF Burkheimer Fly Rods
Nextcast Spey Lines