Don't cut the bow yet.......rough in new string nocks 3/4 of an inch shorter at each end. Exercise the new set up a fair bit, and check your tiller braced and then at draw, if braced is to your liking.
Shoot the bow and see how you like it. Check draw weight too-even though that's just a number-how it feels is what counts.
If you need to go shorter still-you can do that too.
Do any final tillering and finish up the new length and tips.
Let us know how that goes.