Im in the exact same situation Wildthing. I just sold a new p66 that I had to partymarty because I have no clean water on my transom due to the trimtabs. I also have a HDI 50/200 skimmer mounted that works for crap on my elite 7 at any speed other than trolling. The plan is to keep the DSI (HDI) skimmer where it is and keep it for when I want the DSI and move the P79 to the Elite 7 and add a 1kw to my HDS7
You might consider a B60. It has the same element as the p66 but its the bronze through hull version (i might as a last resort)