I have been riding on Ocean Beach in San Francisco with an MBS Comp 16 pro with stock yellow shocks. They're generally fine, but I sometimes find the board wobbles at higher speed. should I try stiffer shocks such as the orange or red ones? Anyone who has experience with changing out MBS shocks, please let me know what you think the optimal set up for landboarding on the beach is. Thanks guys.

Claudio,
I was watching You yesterday and I think You making progress already.Shocks will help You little but it's all about leaning back and be powered.I remember that when I started I had same problem and wobbles stop after replacing from Yellow on Red shocks a little,but all fun began after I start to lean back.I can help You to change shocks.Personally I think It would be easy for You to start with red and later switch to orange.Also consider 9' tires and ride closer to the ocean where sand is hard packed.

my setup is Yellow in the toeside, and Orange on the heelside. if you're doing high speeds I'd go Red on the heelside and keep still Yellow on the Toeside.