In this situation where you don't have a trustworthy shop to help you, and it's difficult for us to tell you foolproof instructions (because FKS are set "by feel'), videos might work best for communication. But instead, maybe start over by at least making sure it's possible to set the FW pressure too low. To achieve that, adjust the arms to become very long, click the boot in, confirm that the dildo pops ALL THE WAY UP 100%, and then confirm that your hand can pivot the dildo easily enough so you'll think "Whoa, that's gotta be too much easy pivoting movement, so my boot will just be swimming loosely while skiing." If you can achieve that, then that's a good sign. That means it's possible to shorten the arm length from there, until it results in correct FW pressure. Then, at that correct FW pressure, there are some final checks to decide whether or not it's an acceptable mount (ask us, if you reach this point). On the other hand, if you can't even find any long arm length that confirms a low FW pressure position is possible, then you probably need to give up on the current mount and then remount for the correct boot sole length.
I say don't even work on that until after you get the FW pressure correct. But before you set FW pressure, make sure you first set DIN on heel AND toe to final value (or even higher...but NOT lower). Anyway, I think you have a DIN=12 toe, right? Those toes have a left wing part, and a right wing part, which are able to move away from each other by design, which can open a gap between them. With bindings all set to proper FW pressure and DIN, if both toes have the exact same gap there with boot in, then it's probably by design for the toe wings to spread in order to conform to the shape of your specific boot model. On the other hand, if the 2 toes have very different gap widths, then that would be very suspicious.
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