My 13 year old son can do both heel and toe turns on his snow board. However he is struggling with an inability to really carve across the hill in hard pack. He finds on hard pack snow he just side-slips down with the camber of the hill (towards the trees) as opposed to carving across it. I keep telling him to lean in to get an edge....but its just not working. I think it also gets worse as he is kind of a slow boarder and so does not get a ton of momentum up. Lastly his board may be slightly short. He just keeps getting teller by the day!
I noticed his board shape when looking at the base is curved across it's width, which I think diminishes its ability to get a good edge on hard pack. I suspect that is helpful for kids so that it makes it easier to transition and avoid catching an edge....but I think as they progress it leads to an inability to get an edge.
Do you agree if he can do both turns, he is ready to progress to a flat bottom board (when viewed across its width)?
I have come to the realization that he is not a speed demon (unlike his younger son or his Dad

), but I don't want him to get so frustrated he stops wanting to be part of the family fun.
Thanks