I put a PVC pipe plug in place of the stand pipe and remove the QDs from one of the Bucket Blaster lines and 2 draft lines. I then use a male flare coupling to connect one draft line to the Bucket Blaster line, run a piece of 3/8" silicone tubing between the 2 faucets and another piece from the second draft line into the bucket as a return. I have return springs in my faucets, so need to prop them open. I switch the 2 draft lines to reverse the flow after a few minutes. Not sure if it helps, but only takes a few seconds.
I clean the QDs separately, using a chop stick to depress the plunger while running hot tap water through the disconnect. I've seen fittings to connect 2 ball lock QDs together and are supposed to work with either gas in or beer out QDs. Will probably order a couple of them to integrate cleaning QDs into the process.