You're cramping my style!

As a final precaution in my spline joint process I sandwiched the joint between two 2x4s to help make sure nothing spread as the glue dried. I have clamps on both ends and some old CRT monitors on top for weight. Try doing that with your fancy LCD screen! I also left my two ratchet straps in place clamping the two sheets together.

As you can also see in the above pic these two sheets already have the wheel wells cut out. Cutting these out before joining let me make the cuts outside to avoid getting too much sawdust in my shop as I have yet to invest in a dust collection system. Unfortunately as we move into winter this is going to become less and less of an option.