Anyone ever add a drain plug to a torque converter?

Hey All. My 904 340 style converter has a drain plug in it. Nice. I am running it on a Magnum 360 and knocked the weights off of the converter. No issues there except you cannot drain it while attached to the Magnum flex plate but that is not the issue.
I recently acquired an A999 and there is no drain plug on the L/U converter. I want to flush or at least drain it and this is next to impossible without a drain.
Has anyone ever drilled and tapped a converter for a drain? I'm talking a small 1/4" brass plug. Nothing crazy.