A $20 extension puts you back to a longer length if you cut too much, so I wouldn't worry about it being too expensive an experiment.
You give up shooting leverage and some mechanics when going significantly shorter, adjusting flex can get you part way back but it's still something you have to spend a good bit of time on to re-learn and adapt to. Crosby can't shoot like Laine but he manages to do pretty well for himself all the same right.
It's more a case of what style do you want to play and what's the best tradeoff for handling and puck protection and passing vs. shooting to compliment your playing style.
colins