The Frankenbinder process was much simpler than the link posted. The Burton getta grip cap and ratchets actually work with the Union ladders. No mods were necessary and it was as simple as screwing the Burton caps into the Union laders. I still need to adjust them for my boot but this is the result:
(*flux's I ordered were over sold and really missed SL's after riding my Cartels again)
Did the exact same thing just a few minutes ago thanks to your post! I actually have the same boots (Salomon Synapse) as the OP and it fits like a glove.
I have the Atlas bindings and no matter what I did, I could not get the toe strap to stay. Everything else about this binding is awesome and I would've hated to get something else just for the toe strap. Now I have arguably one of the best toe straps on the market on these awesome bindings and everything's perfect. Thanks again Chef Jar!