When you get close to marble, tile or wood transitions slow down the trex speed to it's slowest speed. It works fine wide open, but slower you go the more it extracts (obviously), it works about as well on low speed for extracting OSR urine spots as a water claw...and you can cover a lot more ground. If you have a spare 13 inch pad driver you can take three lengths of aluminum channel and mount them to the top so that they fit over the t-rex feet...cut them to length so that they touch the center brass hub and the end of the inside of the foot. This is by far the fastest way to pre-scrub. Much of this other t-rex owners helped me figure out. The flex head is pretty awesome on CGD and other short napped carpet or rugs. Twice I've pulled up a little carpet, both times were per-existing problems...one was a "repair" someone made with super glue...the second was a large patch that was not laid down properly...if you're worried about a spot just slow down and don't hover over it. I use about 400 psi and then use the thumbscrew on the trex to increase or decrease flow. It's very versatile. It does have a tendency to drool when moving it from one room to another, just burp it (break the seal on the carpet) a time or two and give the vac a sec to pull the extra fluid up the tube, otherwise if you fishing and leave it upright on the carpet and pull the hose of dirty water will drain back on the carpet, all our tools do this to some extent, once you're used to it, no big deal.
