Meet G-Mat 110 (AKA "Steady Eddie").
Eddie is a tweaked Nouveau Racer. For those unfamiliar with it, the Nouveau Racer is a 4 pontoon surfmat with lower volume and comparatively round corners and notable concave designed for solid surf. A number of riders, including myself, have ridden this design in good waves around the globe with the feedback being pretty consistent... It takes a good wave to get going but once you do the mat is very dependable and maintains a good degree of glide for its size.
That's the real trick: building a mat that achieves hold without just bogging.
I did notice one thing that I wanted to change, however. On really sizeable days, I was having to kick like crazy to get in to waves, given the mat's smaller profile. This resulted in some pretty hairy drops! Given that, I revisited the design and added a little more length (just a smidgeon). This runs the risk of slippage (there is a goldilocks zone when it comes to aspect ratios) so I needed to up the hold.
A very slight alteration of the I-Beam positions to slightly enhance the concave has done the trick. The results so far? A mat that behaves as before but gets going a little earlier.