Well I got a used Brute from a fellow cleaner and haven't used it in a job just yet but tried it out at home (scary yes I know, but the areas are horrible anyway) and it is amazing how much soil it will pull out in the pad, anyway back on topic, the wonderful gentleman modified the spray system and it is amazing how no one thought about it before.
Basically, the tank is removable with no tools and very sturdy when mounted and added a QD to attach a sprayer for prespraying difficult areas to clean with hand tool. Very ingenious in my opinion.
BTW, he also changed the driver, it now has the Orbitec driver opposed to the CCS wooden driver. It's a pretty cool machine.