Leave the shafts alone if they are flying correctly. I shoot full length GT3555's - not because I have to (my draw length is only 27"), but because that is what that particular arrow shaft "wanted" when I tuned my bow with it. I shot them bare shaft with the weight I wanted added behind the insert to get me to the desired grains per draw weight, and right away - perfect bareshafting. I saw absolutely no reason to go start cutting on them if they flew right. I'm glad I didn't cut any of them - I shoot all my GT3555's full length, and weight them all the same (by groups for each bow) - perfect results every time.
Now... if your arrows are showing a weak spine for your bow when bareshafting, and you have that amount of overhang... then that is another story. I'd either change to a stiffer spine arrow, or cut the ones you have - personal choice - but I like to have a little hanging off the front.
Good luck, no matter what you decide to do. Hope you had a great Labor Day weekend.
All the best,
Glenn