Does anyone have experience with the Sora 3500 levers for touring? I'm not interested in bar-end shifters, and I would like a reliable set of STI shifters with Shimano's new cable pull ratio. (I have TRP CX9 mini-V brakes, which worked very well with my 105 5700 levers, but those levers were double-only and ended up on my new road bike frame). I just wonder if the new Sora shifters are durable, or if they are really plasticky and likely to break. I also can't find any information as to whether they pull the same amount of cable as the 5700 levers.