If you use the noodle with the hole, you have defeated the purpose of the foam: ...to keep the water out.

The ventalation tube in the stock foam is very narrow. When it clogs, you need to use a thin wire to clean it out. Folks that have hulls that pressurize in the heat, need to clean this tube out to allow air to vent. Save this tube, and put it in your new piece of SOLID foam. Because it is so narrow, tha amount of water it lets in is very tiny.