Tough to catch a small leak since the belly pan catches it!
I really tightened mine up just to make sure. The K&N filter seems to be a little bigger than the Bosch but that was the only difference I could see, first time I have ever had a oil leak at the filter on any car.

 

I just found that post & read all the way through it ...It was like a mystery novel ...I kept thinking " Get home & sort it out " .....Phewww glad you got it fixed ...Yea the Butler did it with a tyre iron ...No folks it was a oil & a bad filter ...Great ending , I couldnt stand the suspense much longer.....

 

Me too it rained for 2 days straight and I couldnt get out there it was killing me!