With 2219s, no worries about going under 350 grains...
Per info on the Easton web site, the 2219 is 13.8 grains per inch, so a 29 inch shaft alone will weigh 400.2 grains.... add a 100 grain point, aluminum insert, vanes & nock, and you've got one heavy projectile, probably over 550 grains. If the front-of center balance is good and you can resolve vane clearance issues, it would be more quiet at the shot and more stable in wind than the lighter weight alternatives, but your pin gap (i.e. arrow drop) will be much greater.
Compare the grain weight to the 2413 at 10.7 grains per inch, for a 29 inch shaft weight of 302. Once you add your inserts, vanes, nock and point, your total arrow weight will still exceed 400 grains easily - still well over the 350 minimum.
Even my Easton Carbon Epic 400s (last year's model) at 8.17 grains per inch easily clear the 350 grain mark - they're about 375 total. Plus, my current bows actually top a bit under 70 pounds (66 & 68) so I've got some added margin of safety there. I don't try to flirt with the IBO/warranty minimum, but I do like to have as flat a trajectory as possible, so range estimation errors are less critical.
With 2413s, I had pins at 20, 30 & 40 yards. With Epic 400s, they're a touch closer together and set at 25, 35, 45 (plus 55 & 65, but I haven't found anywhere in the woods in GA you can actually have a clear 65 yard shot with a bow.;) )
I would definitely try cutting a couple of those 2219s down 2 - 2 1/2 inches first - it would certainly have to improve the FOC balance, not to mention take 30+ grains right off the top :eek:
Good luck with the tinkering - I think I enjoy that as much as the hunting. If I don't respond to this thread within a day or two, shoot me a PM, I sometimes forget to check this board every day.