Hi There I have a 12' alum boat but there is no hole at the base of the boat for water drain out if the water get into the boat,I know there is some boat with a hole, you just unplug then the water will drain out from the hole ,Can I drill a hole and buy a plug to do it by myself because I don't want to put the water out by bucket everytime but where should I drill a hole on the boat and how big of the hole is it ? and where can I buy a plug ?any help would be appreciated,thanks a lot !!!