Betelgeuse III is undergoing a big refit. Tired of the smells from the flexible holding tank that comes stock in the boat. Looking for advice from any Cherubini H-36 owner on manufacturer/model of solid holding tank that has worked for you. Checked Ronco and Raritan. Ronco seems to have a better selection and is recommended by Peggie Hall. Thanks for any advice. Pete s/v Betelgeuse III