How many bulkheads?

[rcnight]

My 89 WA had 3/4” plywood bed & bulkheads - all rotted to various degrees. If you’re not foaming the tank in ( highly discourage this method), you really don’t need the fore & aft ones. If you secure your tank adequately, you should be fine. On the other hand, they are small, don’t use up a lot of material, so probably wouldn’t hurt.