Cross stepping on a Walden Mega Magic

Hi, I've been riding a 9' Walden Mega Magic for some years now and wondered if I might be making certain aspects harder for myself to progress as regards cross stepping and nose riding. The board is fantastic in so many ways, but because the bottom is concave I wondered whether this might inhibit my cross stepping/nose riding ability as it's not the most stable board when rocking in a side to side motion. [it's easy to fall off even paddling out!]
My questions are :
Has anyone else had experiences of cross stepping/nose riding on a board like this [concave bottom] compared to say a Takayama In The Pink
[where the concave is just at the front] or a flat-ish, no rocker thing.
I'm thinking of going upto a 9' 6" Walden Mega Magic, [6 more inches!] so I get the superb paddling, reasonable turning potential AND a bit more stability for cross stepping/nose riding.
Thoughts?
My questions are :
Has anyone else had experiences of cross stepping/nose riding on a board like this [concave bottom] compared to say a Takayama In The Pink
[where the concave is just at the front] or a flat-ish, no rocker thing.
I'm thinking of going upto a 9' 6" Walden Mega Magic, [6 more inches!] so I get the superb paddling, reasonable turning potential AND a bit more stability for cross stepping/nose riding.
Thoughts?