The only other main adjustable setting is the idle speed, done with the screw on the left carb .....
You use that along with the mix screws to achieve your best and smoothest idle of about 1100 to 1200 RPMs when the bike is warmed up. There's also a sync screw between the carbs you use to get them both running at the same speed. For the time being, you should be OK as long as that's close. If you set the idle at 1200 when the bike is cold, it will idle too fast once it is warmed up. None of the cold running speeds are controlled by a computer like on modern vehicles. You are the "computer" on this old bike, lol.
So, it sounds like your idle speed may be set a little too low now. Usually, running on choke produces higher than 1200 RPM running. When you turn the choke off now, the speed is dropping too much and the bike is stalling. So, this is something you're going to need to tinker and play around with. Evetually, you'll get the hang of it and find a good setting. The idle speed will be below 1200 when cold, maybe at like 900 or 1000, but it will start climbing as the bike warms. The trick is finding the setting that will not let it go too low when cold (so it stalls) or too high (above 1200) once it warms up.
You were right about not over-tightening all the other jets. You want them tight just not too tight. I install them using a stubby screwdriver. This lets me get them tight enough without making them too tight.