Perhaps someone on here is familiar with a 1993 Mainship 40' Sedan Bridge. I just purchased the Lectrasan and would like to know where you would install this unit in this boat? There is only 1 head in the boat I have a small 26 gallon holding tank in the floor between the hall and main stateroom. I have also asked this question on the Yahoo Mainship forum. Any advice would be appreciated. Thank you Bill