I try to choose an applicable existing topic, when possible, so this one is today’s choice.
The tank from my eBay A7 barn find (“Jeez, Richard, aren’t you done with that YET!?”) has a depression surrounding the bolt-down hole. In the picture, I’ve filled the depression with a blue liquid so it (the depression) could be seen. My A10 has a 2-1/2 gallon Catalina-style tank, so not familiar with this stock larger tank. Thanks, in advance, for comments and advice.
Richard L.