Sorry hawk, misunderstanding, didn't notice Sharp edges, just use industrial zip tie then. Love my fx5 running 6 months not one problem.
Most the probs with the fx5 are micro bubbles which can be easily fixed or second hand units which you can never know if its reliable.
I had so many issues with my xp4, that my fx5 is a god send.
Go S. Vettel #1 rb8