Have you had any luck finding help? I'm curious if your problem is similar to mine - I can get mine to run perfectly. For a period of time anyway. Then after anywhere from 5 minutes to 1 hour it acts like its starving for gas. I've been running it with choke fully engaged as well. I have rebuilt the carb - with a kit from the company that posted to this thread incidentally-, searched for debris etc. Pulling my hair out here.
Have you found any further info on the carb?