LOL like I said in that other thread, 17 years is a long time to be on a forum. I'm sure there is a long long list of stuff that could be mentioned that only old timers would have a clue what the heck is being discussed... but I can't remember right this second.
That said, I still can't figure out what OMI means in this reference... I feel like the I is for interchange because that is used all the time in salvage yard terminology, but I cannot for the life of me figure out the rest.