How do we feel about stick extensions?

My nephew is a 6 foot 3 inch D man. He likes the reach and has slap bombs from the blue line. He already has been using pro stock sticks from a tall Dman from Colorado system. He’s been using the stick for two years now and can only get one more. He’s been using a re-stickered FT6 but is a Ghost for what’s it worth. He wants a new Tracer and loves how it feels but the longest is a 62 inch in a retail stick and can not find one the length of his Ghosts. How do you guys feel about adding those glued in stick extensions? He only needs about 2-3 inches right now, my OCD doesn’t allow me to think it will last or it’s not “whole” are they ok for competitive play 3-5 times a week!? Thanks for any insight/advice/suggestions.