Like many owners faced with the need to replace my holding tank I'm spending more time pondering how exactly I will tackle the project than I will ever spent sitting on the head. Lately I am intrigued by the Lectasan as an option. I keep my boat in freshwater in Seattle but, as a rule, never use the head during day sailing. I do enjoy cruising in the San Juans where MSDI devices are legal outside of state parks and arenas. So I faced with installing a Lectasan and a small holding tank (for fresh water or marina emergencies) with a Y valve between the two. When I discussed this with the marine sanitation expert locally he described many maintenance problems with Lectasan and discouraged it. Any comments or suggestions from current Lectasan owners, particularly those who may also have a small holding installed? Thanks.