The water balast is leaking into the back bilge of my 26X. I attached vaccuum cleaner to gate valve and soaped inside under rear bunk. Found 2 pin holes in corners where balast reduces down from two feet to aprox 1 foot. Patched but seems to have other leaks on top of the balast tank that are not visible. I would hate to cut out center of bunk, or a hole not knowing where the leak is and install port hole, if it is cut in correct place. I also thought about putting fine sawdust in balast and filling while on trailer. Does anyone have any suggestions? thanks scott