Replying to Touring binding BSL question

So I was sent some Naxo touring bindings that I was planning on using this season, but their max bsl is 300, my boots are 306. I can definitely give them to a friend if there’s no safe way of mounting them. My boot will click in but Im not sure if the forward pressure will be safe. Went to a (not awesome) ski shop and they told me they hadn't seen the bindings before and wouldn't look at or work on them, before I drive to a better ski shop let me know if I have any chance of these working? Happy to take pictures too