no, i haven't, but i know someone that uses the raichle tongue in his AT boots for the ski and he's recommended that to me. his would be a bit big for my boot, though, but probably modifiable. i haven't looked into whether they make smaller ones and where to get ... but maybe that's my next step.
anybody happen to know if these are available anywhere in/near seattle? or know of an online source? maybe i should call my local bootfitters?