oil change on my Tripacer

Did an oil change on my Tripacer. I've done them before and they're pretty
easy. This one though, it looks like my oil screen cover is leaking like
crazy.

I actually changed the oil last month right before it went into annual. They
flew it (looks like a couple of hours worth) with no leaks apparent. I flew
it for the first time last week and when I was parked to gas up noticed oil
dripping. Went up today and checked the torque on the oil screen housing and
they were all tight. Came back after 20 minutes or so and found I had left a
trail of oil. Lost a good part of a quart. I'm thinking I may not have
torqued them down evenly and I'm going to try replacing the gasket and going
around the bolts a little at a time. I usually retorque them after I run for
a while after an oil change because the gasket tends to crush some.

Any ides or suggestions on why this is happening? The surfaces are (were)
clean. I'll check better when I replace the gasket.

TIA.

mike regish
'53 Tripacer