I have a West Marine 310 Rib. It is a hard bottom, V-hull shape. It does not have the 2nd flat surfaced floor. Does anyone know if there is an aftermarket 2nd floor that can be installed? WM was no help on this. Or, has anyone made their own 2nd floor to put in a dinghy. Biggest difficulty I see with making one is determining how to attach it. I would like it to be removable due to weight and for cleaning etc. Otherwise it could be easily just permanently glued in place. Appreciate any input.