i know this thread is old, but i just picked up a redington Hydrogen 3110-4 and i think for me it is a perfect soft hackle rod.
i lined it with a rio DT3 on a sage 1880 reel that i had previously set up for my Echo 81010-4 SR swtich, with which i cast shooting heads on an airflo shooting line.
i kept the shooting line on the reel and looped the 3wt line to it; this increased the weight and improved the overall balance. the 1880 seems like a huge reel for a 3wt single hander but honestly it could have a little bit more mass to it to get a proper balance on the cork. the 3100-4 would prob balance perfectly with it.
anyways, i ventured out into rural vermont yesterday evening with the box of wets and took some trout on a size 18 sulphur-colored cdc wet on 11' 7x fluoro leader and i couldnt have been more impressed with the rods ability to cast nearly the entire DT line, mend with ease, and control a swing. also impressive was how sporty a 10" rainbow felt on it.
the reel is gigantic compared to the grip and reel seat but at 11 feet with the huge reel i feel like its a mini version of
AHE Wood's single hander setup for salmon, and that makes me feel great