Pete---filters don't bypass because of high pressure--they bypass because of differential pressure( if the filter is blocked, it will bypass) were there any chips on the inside folds of the filter___NO---
If you pull the engine, put it on a stand, turn it upside down all so you don't have to work on your back---you will have then dumped any debreis still in the pan up into the engine---
No matter what you do work on the bottom of this until it is absolutely down to a complete overhaul---
If your
oil system filters the
oil before the cooler, you won't have any contamination except in the lines from the engine to the filter( remote?)
I would suggest getting rid of your main support in favor of the aviaid scraper/windage tray--you can do some straps on the mains probably