Yo Greg,
I use an FL-1HP mounted remotely.
Only problem to date is one defective filter
The symptom was rapidly fluctuating
oil pressure at idle and every other speed immediately after I did an
oil and filter change. The mechanical gauge looked like a windshield wiper on steroids
Changed to another new FL-1HP filter and the symptom went away.
Weird.
Got 16K on the engine now, including some "rough service" such as a couple hundred miles at WFO on the track at Sebring and no problems with them so far, other than the above noted one.
Haven't been able to find a way to get this one to Motorcraft for their post-mortem yet, but still trying.
Tom