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Question: Just received mine and the large plastic top piece needs to be stretched slightly to fit and falls off fairly easily. Normal or should I return?
Document: Have not tried it for popcorn. We've been roasting coffee for 4 months now, and it has done great. We do have to let it cool down between batches (melted the top plastic slightly). We roast outside so the chaff blows away. During the winter, I thought the toastess was losing power, but it turns out it was just that the cold weather meant we needed additional roast time.
Yes, it works just fine. My one complaint is that I think its a little too short. The popcorn has so much momentum that it carries a lot of un popped kernels out with it. I feel like it if was maybe taller it would have a chance to shake off those kernels? I don't know. I use it a lot, I'm just super annoyed by the large amount of unpopped kernels. also, fat chance at melting butter on the top of it.
I bought this for roasting coffee, not making popcorn. It makes popcorn just fine, but that's not why I bought it. It took me awhile to figure out how to roast coffee the way I like it, but this is it:What you need: Green coffee beans, the Popper, a measuring cup, biscuit cutter, colander, timer, pot holder, and a 9x13 pan.1. Remove plastic ejection spout and lid from top.2.
Make sure you have a container to catch the chaff and the 1 or 2 beans that will inevitably fly out. I am limiting myself to roasting no more than 2 batches at a time, since it others have said that going over this will significantly reduce lifetime. It also gets very hot and I don't want to melt the plastic cover on top.Overall I recommend this coffee roaster... it's probably the closest thing you can still buy at the moment to the West Bend Poppery II.
We bought this popper for popping the Green Coffee Beans. It works like a charm. After it runs about a minute it starts to rattle the plastic top, when you try to stop the rattling it gets louder.
(This will expand to 1 cup of roasted beans at the end)3. Set a large biscuit cutter (or other metal cylindrical tube that is 1.75&#34; tall and 3 to 3.5&#34; in diameter) over the hole (this will keep the lighter mass beans from occasionally jumping out of the popper.)4. Then put your plastic covering and lid back on.5.
As other's have written this is a great unit for roasting coffee. It will take a good size amount of beans (70g) to a full-city+ in about 8 minutes. My only real complaint is that the clear plastic top is already deformed but then it wasn't designed to run this long continuously. Might pop some actual popcorn this week to see how it does with that.
Roast just enough for your next few day's needs. The normal popcorn popper will take 81 grams for roasting green beans (about  cup or about 5 tablespoons green). These yield (bigger) roasted beans of about 9 tablespoons. Since a tablespoon of ground is roughly the same as a tablespoon of roasted beans, and the moka takes 3 tablespoons for 6 cups of espresso/moka each pot, that gives you roughly three days of roasted beans.
I have to warn that a friend of mine purchased a couple of these poppers and one of them didn't have a strong enough fan to do the job.
I'm sorry but I am not happy with this popper, used exactly 6 times then it stopped heating up and the top start melting
Answer: I would return it!   Unpopped kernels fly all over the place when using the Toastless TCP-713!!  Purchase an Air Crazy by Westbend instead!