I don't have the exact temp/time for the skates but I did my FT4 Pros at home a couple years back and the CCM directions you posted sound more like what I did, I remember it only being a couple of minutes definitely not 5-7 minutes. I used a baking sheet to lay the skate down on and did one at a time. I followed these steps below aside from the temp/time, also if you haven't read about the wrap technique I suggest you read into it as it provides some great results (you can get the wrapping stuff on Amazon or from Staples or any hardware store).
https://www.icewarehouse.com/lc/skates/how-to-bake-a-hockey-skate-at-home.html