To be honest we made very little of the Wade/Balance clue. We just couldn't seem to make it fit in with either of the two theories that we thought may have resulted in success.
My interpretation of wade/balance was simply the final retrieval of the cache.
That is based solely on what others have said in the comments but one of the icons at the top also indicates the need to wade.
You will either have to wade through water or cross balancing on something (such as a pipe perhaps?)
I wish my students would display your persistence, Reddevil. I just wish I could help. Is there a specialist forum where your team could get more help with these?
There is no specialist forum for posting these. All we need now is help figuring how to solve this puzzle so that we have a set of co-ords. We have the hint solved but its useless without the right co-ords.