I have that stupid thing, no offense to the manufacturer, but that is def not worth it! I LOVE MY XJETS, I have like 5. But the backpack thing is DUMB! I should have just built it myself but I had a specific job that I thought this would work great on. Anyway here are the problems:
1. You have to be a pretty big guy or strong guy cuz carrying around like 50 pounds on your back seems like its not a problem until an hour into the job.
2. Mine started leaking at the bottom. Which I already knew before hand would probably happen but still tried it anyway.
Someone mentioned that it makes something easy a lot harder and that is the TRUTH. Just pull from a bucket or tank on your trailer. Much easier.