I'm with Rocket. From a boat, a shorter faster casting rod works very well for twitching, ala bass jigging and inshore popping. Been using a short St. Croix bass rod and a Batson HS9000 custom casting rod. While the HS9000 is nicely balanced, it's a magnum Hot Shot blank and somewhat limited in casting distance (not a big deal) and accuracy (bigger deal). Unfortunately it seems like all better short casting rods (under 8' 6") are all 1 piece blanks. But, I've been eyeballing a little 7 foot 2 piece Inshore Batson blank (IP843F) lately. Currently my main twitching rod is a Sage CT286 because it's a 2 piece and easier to carry; really light, nicely balanced for twitching, extremely responsive, adequately fast, great bowels and casts and pitches beautifully too. For me anything over 8'6" is either too slow, too heavy, not accurate enough for pitching around the wood, trees and brush or is just too unwieldily or tiring to use for extended periods twitching IMO. If you're only fishing the big deeper open pools then pretty much any light steelhead rod capable of casting 1/4 - 1/2 oz. will do.
I'm sure when it comes to twitching we all have a lot to learn from the bass community and of course from Master Merg too. In the meantime it might be worth checking out the Batson rodbuilding Forum or even give Adam or Kerry at Rainshadow a call. They're very knowlegable and helpful.
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Matt. 8:27 The men were amazed and asked, “What kind of man is this? Even the winds and the waves obey him!”