Trans (AODE-4r70W) cooler line leak fix?

the line may have been tightened too much. My guy has white hair, missing a few teeth and hasa tq wrench for a writs. (joke)
But I think that may B the problem. If U have enuff metal line left to re-flair do so (what type? double bubble, single, etc) other wise itsa whole new line, nota big deal cept 4 tryin to feed some thru to where they R sposed ta lie.

Use a line wrench (almost circular in shape of 'grab-the-nut' area) to loosen and tighten. We use 'em on brake bleeders, etc - when bein 'tender' w/'our loved ones'.
aahahahaa

"...tranny pan....'
warped? Place on known machinest flat (?piecea glass?) to ck? Tap flat? B sure to not over tq when putting back on so as to warp again? Use no gasket snot to 'glue'.

"...doing a different attachment..."
& what wuz that?