Drain small amount from 700R4?

[Skunksmash]

Is there some way to drain say, 1 quart or half a quart from a 700r4 transmission? Perhaps a fluid transfer pump, going down the dipstick tube? I had to add a little fluid after working on the speedo cable leak, and now it looks like I added too much. So is there some way to drain off a small amount? Without dropping the pan.

If not, has anyone just drilled a hole in the pan and then Just screwed in one of those summit drain plugs?