Bosch Click & Clean to Festool extractor adapter

Connect a Festool extactor hose to a Bosch Click & Clean tool.
Print upside down with no supports.  Retaining ring does need (or at least benefit from) a touch of support under the bottom of the lugs.  I used tree support for it as it was a lot less material than standard supports;  it only needs a couple of layers and only under each lug.

The use of the Festool logo (which shows up much better if you don't print it in black) is solely to indicate what this adapter connects to and in no way implies affiliation or approval by Festool.