Thanks- I called Mercury today and they were little help. They wanted a kit number and couldn't make recommendations! I'm going to get a kit number and see if they can let me know what they used. I know what my old Benett trim tabs used (plastic lines) and I know they are not as high pressure as a loader, but heck what do I need for their K-Planes? Anyway, if anyone has any ID/OD and pressure/material specs, that would be great. I am going to keep searching also.