Hello Steve,
I own the same model and experienced the same issue (burning). If you read the in-depth portion of the user's manual they tell you to lower your rangetop setting from what recipes recommend if using an electric (coil or ceramic) stovetop which is what I have. Possibly that is your issue as well, but if not lowering heat input should still solve the issue. ALSO - on the high pressure setting I noticed I need to tap the PC with a wooden spoon near the popper-indicator to get it to come out ... otherwise it often sticks and you end up cooking far longer thinking the PC is still just coming up to pressure. I hope this helps. I love the science behind Cooks Illustrated and have been just thrilled today to learn of the MC cookbook - can't wait to save a bundle and purchase it. Just reading the descriptions tells me I will love it. We have a chef here in Fort Worth, John Bonnel, who was a chemistry prof before attending New England Culinary and his unique and amazing tasting offerings were what first got me interested in understanding all the processes and chemical reactions that create great food - sounds like this book captures exactly that.
Cheers,
Steve in Fort Worth
