These are all screw top Centurys, the pink is very stubborn and needs to run very hot to get going, the yellow, orange and green also like the high heat but flow OK. Temps in the room were cool as I had the windows open today, about 63 to 65 degrees. The black has bled its color and the blue goes hazy if not used alot. From left to right..
Pink
Purple
Red
Yellow
Black
Lime
Blue
Green
Orange
I will have to try that, it runs ok sometimes but most of the time it needs more heat. I jump started it with a 60 watter before and it ran fine the next few times but ends up the same. I will let you know if the xtra coil works.