I was never taught to write software, but I am thorough, I test this stuff, and it solves some unusual problems in ways others had not done. I won't waste time or space posting things I think have been solved many times elsewhere. Specific details needed for any part of this section ought to appear on each page in it.
As to reliability, I acheived it in the context intended, and it may work elsewhere too because I try to avoid unrequired functions and dependencies. It may be easy to port this code to other situations if you know how. Sod's law applies, but Sod was invited to thrash the hell out of it in the original context until he could no longer break it.