i have a 2011, it is a little different, but it is targeted toward the same kind of riding. again at high speed, this is not a damp board, so when u say groomers, i think speed. in the morning after a fresh groom, course its not bumpy. at the end of a weekend day, at high speeds, you will feel every smallest bump. it also has a classic camber, which is not ideal at all for powder, but the tbt helps a bit because the spoon on the tail sinks, while the middle of the board is all flat (= float). i still move my binding back for pow and try to stick to the steeps, cuz that nose wants to dive.
you may be over-analyzing your foot size/waist width situation. you have a 10.5 and 11 is where ppl start to talk about waist widths to buy wides (have read ppl often try even with 11's to switch their stance and try to make a normal width board work because they ride better than their wide counterparts). also a little overhang is no biggie. i switched from 12/-12 this year to 15/-15 and like it alot, you can do such to eliminate more overhang.
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