Yes and not just on the Es. I started leak seeking just like you do when checking for leaks on a gas water heater. I use soapy water and a length of fuel line on the carb nipple. Slather the soapy water all around te carb and the case, open the carb and stick a finger over it then blow hard on the line. When you see the bubbles you know where the leak is.
One of my SK .91 wouldn't quit running at all unless I pulled the fuel line. I got home and did the soap thing and found air bubbles at the steel insert that is press fit into the case for the carb hold down screw. The Fix: cleaned the area around the case and inset with acetone, mixed up some JB weld, heated it up to thin it then squished it with pressure around the leaking area and wiped off the excess. Problem solved.
When it got hot the case was expanding more then the steel and over time wasn't seating tight enough and causing an air leak.
There you are, my trick for the day!!