I built a knaider and swaider this week and have been out practicing on WE steps. It's amazing. I have some hawk minis I plan to try in the next day or two, but between the hawks and WE I'll gladly carry the steps over 2 or 4 hawks.
The K/S is so much more solid feeling to me than any type of aider I've ever used. No messing around trying to get a foot onto an aider step, stable, easy to connect and lightweight. I'm planning on running for WE steps, K/S, with a lineman going up, tether at height on rappel rope and rappelling down on a figure 8 or my beal birdie. Will leave a preset for coming back to SRT. I think I've found my jam!