I can help you with drawings 2014 and 3012. I'm not sure what the 2016 is.
I've been using the M816 since 2002. I've been very happy with and after I "learned" how to use the lean mode I really enjoy using the monitor.
I don't belive Alegro is around any longer so we're on our own.
I'll try to scan the drawings and email them to you.
I have an unused, still in the box basic 816 if either you are interested in one to keep as a spare...
Especially since spare parts are no longer available....
Make an offer for the unit only... I'll sell the probes seperately.