there have been a few guys trying to get a safetystrap thing going. they got it for the Note 3, thanks to a gentleman by the name of Hashcode. he has tried to get it going for the Mega. I am not sure whether he is still working on it or not, I know he had hit a big hurdle and took a break for a bit but it was on the agenda to give it another shot. that was maybe about a month ago or more.
another gentleman by the name of AZPATTERSON has a thread for possible safetystrap in the General section.
you seem to be a guy with the XDA stats and a big brain to possible understand some of it. you should take a look.