Ol'WhiteCap, wet sawdust allowed to get wet down in the FreeFlow may not vacuum well. I don't know for sure but my guess is a good stream from a garden hose will wash the saw dust away. I think that most people considering these Race Deck floors fail to realize that there is a series of tabs or nubs on the back(bottom) side of the tiles. This allows dirt, grit, dust, salty slushy ****, etc. to flow under the tiles. I have the beveled edge pieces along the overhead door side of the floor. They also allow the drainage to flow under them and out under the door bottom seal. No pooling. The clicking noise is practically non-existent on my floor. My buddy's Race Deck diamond plate pattern does make more noise than mine. Squeaks more than clicks. We just laid his about 10 months ago and it may quiet some with time. I think that mine makes less noise now than it did 30 months ago when we laid it. Possibly the weight of the cars have caused the tiles to conform to the undulations of the floor, I have no complaints of any kind. One more thing about the beveled edge pieces, I feel, just a feeling no proof, that the edge pieces allow tires to enter the garage with less possibility of the tiles scooting as the tires strike the tiles. I can see where the landscape fabric would lessen the clicking but wouldn't the fabric trap dirt and such thus lessening the ability of the tiles to let moisture flow under the tiles? Seems to me that at least some dirt would be trapped by the fabric. I only swept and scrubbed my garage floor, it had no oil stains or such, and installed the FreeFlow. 20 x 25 and we love it. My neighbor has DIY'ed epoxy on his floor. At least twice as it wears and pisses him off. Numerous horror stories on here about epoxies. The Race Deck is portable, if you move or you can sell it and replace it. Using a floor jack, rolling my tool box, or using jack stands has not been a problem. I do use some plywood scraps under the jack stands due to their bottom design. Some guys worry about creepers. I haven't used any type of creeper but would guess that the old style narrow steel wheels would not roll well on the FreeFlow tiles but the modern urethane or what ever would be fine. Another guess. Hope this helps. Good luck. CJDave.