I would like a first hand report on the warthog wt 3/8 jetter head. I would be buying it to run on 3/8 line 200ft. On a 3000psi 5 gallon a minute machine. I don't want to buy it if it needs to be run on a higher GPM machine. My rep in Seattle said it works great on my size of machine for cutting roots. If I need a trailer jetter with 10 gallons a minute then I will just have to buy one. I am not expecting my 5 GPM machine to be as fast as a 10 GPM but I would like it to be effective though slow on roots.