I am re assembling my lower unit. My particular model does not have a gasket for the impeller housing or the stainless steel plate in the housing. I was trying to remember what I had read a couple weeks ago.............so if I remember right, I need to use my avaition gasket sealant on the impeller housing where any metal surfaces meet eachother, and do I also need to coat the outside of my grease seals before I press them into place? Also I was thinking that I should coat all the O rings in OMC grease before assembling. Does all of this sound correct?