In your opinion....oil pan gasket or rear main seal

[DetroitIron]

Finally identified the area of my oil leak...pulled the trans flex plate and wiped oil pan and everything down....then watched the garage floor for couple days. I have small oil drip EITHER from the rear main OR the rear oil pan lip/gasket area(just below the rear main seal). Before going any further dropping the oil pan or even more fun sliding trans/transfer case back, I thought I would check with the experts on here for any visual tips in determining the source. btw I have check oil sending and rear intake gasket area. The pan and one piece gasket was replaced just recently...so I'm leaning towards rear main, but it's such a small leak (fifty cent piece size spot on garage floor after two days...i thought rear main seal would leak much more when they go) I don't know if the rear main seal is the culprit or whether oil pan gasket at the rear hump isn't sealing 100%....Any suggestions? Thanks Guys!!