It was too give better control of the stem of the thermostat as you could turn it with better results. When I used the styrofoam incubator I also put a mark on the stem of the thermostat and the top of the incubator lid when I finally got the temp right so if I did have to adjust I knew where I was when adjusting.
can you go to your original post and add the above quote to your post or actually add info about the LEGO addition please? then I dont have to pull it and do it myself lmao!!!!