I have newish Spanish 40 DCOEs that were leaking, perhaps from the top covers or the venturies (another set of issues to explore). There is staining on the bottoms of the carbs and some fuel seems to be coming from above. The bottom cover plates seem pretty solid, and those use, I believe, rubber gaskets instead of fibre, so perhaps less prone to drying out like to top cover gaskets. Has anyone experienced leakage from the bottom covers? I tried to remove one but it was suck on tight, so I decided not to disturb it. But should I knock them off and use new gasket?