I AM predictable...

but we would have to know to answer your pressure question...

That is probably your best course... I think the TXValve is only about $30...

You must have enough stuff in the system to be changing from liquid to gas AT the evaporator core... that may be the cause of your 80 degree vent temps ....but where you live I am really glad you are converting back to R12... I am convinced you ( and your system ) will be much happier that way...

So are you asking whether we think it is ok not to flush ? Is that the question ? and not to replace your orings...since if you flush you will have those joints open anyway ?