I know that there has been consistency problems reported with the iR2 and you machine may be different than mine. But I've roasted over 100 roasts in the last year and have very good results all but a few early attempts. I think I used the preset profiles maybe one or two times and found them to be way too hot! Then I began to investigate other's profiles including Tom's but after some experimentation I've arrived at a profile that works well for me. Your mileage may vary as Robert mentioned, there are a lot of variables that can impact your results. I too was very frustrated with not being able to hear the cracks. Realizing all of the noise was coming from the iR2 base, I set out to build a box so I could insulate it and hopefully quite it enough to hear the coffee. I don't have any pictures but will try to describe what I did for anyone who wants to try this. I cut a 6" piece of 8" dia cardboard tube (the type that's used for concrete forms) This can be found at any big box hardware store like Home Depot. I had some left over from a homemade telescope project (one of my other hobbies). I then cut a piece of 1/4" plywood slightly over 8" dia to fit on the bottom of the tube and glued it in place. I put the base of the iR2 inside this "box" and pushed it to one side so the display and controls could easily be accessed through a small window that I cut out of the cardboard. Then I filled the inside of the box around the back of the iR2 with foam. I cut another round of plywood that would fit on the top of the tube. Then with the iR2 inside the box I set it upside down on this piece of wood and traced around the top of the iR2 (top of the iR2 base that is). I then cut out an opening so it fits on top around the base of the iR2 to close the space where the foam is. I realized that this was blocking the air from entering into the iR2 from the base (small hole seen on bottom) so I drilled some large holes in the wooden base corresponding to where these small vents are on the iR2. Finally, three small blocks were glued to the wooden base to lift it off the surface where it sits so that air could draw through the holes I drilled and into the machine. The objective of all this was to try to mute the sound of the iRoar so that I could hear the cracks. The results... It really made a difference in the decibels and I can now hear the cracks! The only downside is a slight increase in the temps, probably because some of the heat can't escape from around the insulated base. This has had very minor effect on my roasts, now finishing around 9 to 9 1/2 minutes for FC+, about 30 seconds sooner than it was before the box was made.