Just be careful doing this though, sure it doesn't hurt to check, but just be gentle. Some people get a bit 'spanner' happy and do things up way to tight sometimes.
How many hours has it been since the last oil change, i.e. inspection? You mentioned it's done about 40hrs since being fixed up, so I'd assume only about 15hrs since it's last service?
You shouldn't need to check under the cover everytime you fly, though there isn't anything stopping you of course, but for an aircooled engine (no water pipes to check) they should be reliable enough to last a few hours! I'm not saying don't do it, of course do what you think is best.