Look into the Foam-It 1.3 (5liter) or the Marolex Axel 7000, after having my experience with the IK9, its a nice unit but it and the 12 have down falls that are addressed by both the Foam-It and the Marolex, specifically the ability to change foam density at the tip, instead of the internal adjustment on the IK’s. As I have gone back to university, upgrading my IK9 to either units I’ve listed is something I want to do greatly, but can’t because I’ve chosen to save and not work vs spending money and working. If I have to chose between the Foam-It and Marolex, I’d pick the Foam-It because I could stick my hand in it to clean it. However, I do like the Marolex approach to changing foam density at the tip of the wand by way of plastic inserts whereas the Foam-It uses foam pucks. Scott with DPC has a few videos covering the Marolex sprayers, and Auto Fanatic has an in-depth video covering the Foam-It foamers. If I also had the funds, I’d be picking up the Marolex Axel 2000 and Industry 2000 after spending about ten hours researching pump sprayers. The Marolex are the bee’s knee’s.