No problem. I enjoy fabricating things myself, and I respect the skills of others who do.
I actually used to have a 12v Flowjet macerator, and it worked fine for 3-4 years. It eventually quit though, and I thought the price was too high to consider replacing it. You do have to keep them clean, and since your going to be pumping shower water through them, they will get hair in them that will have to be cleaned out. They have to be taken apart to clean them.
I will warn you though, if you end up using the 12v macerator, you need to get the full cooperation of any females in your group. Their products will kill a poop grinder pretty quick. I doubt a garbage disposer would like them either.
Tinker on, buddy. Show us what you build!
:):)
