Not trying to bash anyone, But all my saws run flippy caps (accept the one husky and craftsman I own) and I've rarely have leakage, or spillage. The few times I have I'm not paying attention to what I'm doing, or I get distracted.
I mean seriously, The chances of spilling out of those flippy caps if your paying attention and not being careless (Which you should NEVER do around any type of chainsaw) are so slim, It would be a leak or faulty cap for there to be spillage,
I don't know, Just my look on things
(I do hate the little buggers though, I just prefer not using energy on b****in' about the caps, I use that energy to put them on and put them on right
Now if they went back to normal caps, everything would be awesome)
Good luck, see 'yall out in the sticks.