The only reason you would want to do this on such a young tree is to get some low branching i would think. I did that on a seedling and have lots of low branching now i am letting it grow.
DryStall
Dry Stall is pumice. I got mine at Southern States in my area. I am sure you can get it at any equine supply place. it comes in a 50 lb bag. My trees love it in their mix
Daveskib
I was part of the Brandywine club and found that the members did not seem to care for a youngster like myself and seemed a bit aloof. No one was rude but I felt uncomfortable there. BTW I am in Bear Delaware.