I use a variety of homemade pans that will fit beneath the screen (or filter) depending on what I'm working on. For my 7ECA, I used a 1 quart plastic oil bottle cut in half around the outside with a razor blade to make a shallow pan. Some installations give you enough room to do the same thing, but with a 1 gallon anti freeze jug. I have also used the microvave pans that come with various lunch food products. I try to wedge the pan in there so it will just collect the oil while I'm cleaning the screen or cutting up the filter. Sometimes you just have to hold it for a minute, until most of the oil has leaked out. You still end up with a little leakage, but that's going away when you solvent wash the engine, which I do after every oil change.
The best solution of all, IMHO, is to get rid of the screen and put an Airwolf oil filter adaptor on the firewall. One nice aside, along with the obvious ones, is that you will stop worrying about how many more oil changes you get before the oil temp probe is beyond the help of ViseGrips.
Hag