That sounds pretty good. To me it is a matter of personal preference? Do you want the motor to shut off when you close the throttle or do you want to push the stop button to kill it? You can set the idle stop screw so it won’t die till you push the stop button. It’s what ever you prefer? Those old motors will get down & purr.
It’s before they worried about every ounce the motors weighed. Heavier flywheels help keep a motor going between power pulses. I’m sure other things factored in also, but today’s engines just don’t seem to place valve on a really low idle. JMHO.

Dan in TN