Suddenly this forum seems like BallOfBindings more than BallOfSpray. There are currently a number of threads about custom hardshells. The thread @adamhcaldwell
started about boot performance
is extremely interesting. I love this stuff.
As administrator and moderator of this forum I have to be the boring guy who constantly suggests caution. Since I have read a number of posts about customizing Reflex shells I am compelled to remind everyone that when you modify the any part of the the lower boot you are changing how the release works. The boot itself is part of the release spring.
If you understand that there is risk and you seek out sage advice I believe a personalized shell may be way better and get you more balls. On the other hand if you think you can just hacksaw your boot without any other adjustments please renew your health insurance and video your experimental rides.
If you really want the best possible custom stuff PLEASE go see a top coach or pro skier. I have heard 3rd hand some things KLP has said about hard shell bindings and I would love to have him hack my setup.