I've been thinking about trying some GT UL 22's for 3D this year. They will probably be the Pro series but not 100% sure. Who shoots them and do you have any opinions on them as for how they hold up. Are they as durable as a carbon such as a standard thickness GT UL or an Easton Lightspeed? The other thing I was wondering about was spine. I normally shot 61-62# with an arrow spined around .400" I'm worried about the .300" spine of the 22's being too stiff for my 62# '06 Bowtech Constitution. Even with 100grn one piece points and bumping my pounds up some that's still a very stiff arrow for the draw weight. Does any one have any opinions on this as well?