foam cannon

Just washed the muddy P500 and bringing this up again as a lot of new members have joined. I learned some good things on searching washing topics and ended up with a Dusichin Foam Cannon as an accessory to my pressure washer. Here‘s an old thread on soap foam cannons...

Saw a few posts mentioning foam cannons for a pressure washer. Any recommendations on a brand? Saw a video on the Ryobi model. Thanks.