RG-4… I have gone over every square inch of the original design and refined and modernized it. The board is fantastic and I am really stoked. This is a full out performance board that goes exactly where you want it. Extremely precise. It has a hip that really enhances it’s turning radius and a concave bottom that produces all the drive necessary for "buckets of spray". This board feels good to surf and you WILL surf it not just ride it!