After putting this box off for a long while because I am absolutely trash at anything programming related, I took the plunge yesterday to get back into it. Finally rooted it today, root was really cool. The biggest issue for me with user was trying to get the local server instantiated in the first place.
Also, if you’re having problems with the bad characters for a key, try base64ing before transferring it to your attacking machine, and then reading directly from a file. Copy and pasting screwed me for a few hours.
Honestly @clubby789, that box really did teach me loads, and it was absolutely awesome the whole way through. Thank you!