I've doneit twice myself.Got so fed up with the hassle,sold 'em,and then got super-dials to do my set for me!By the time you've got dust in the clock,glue on the inside of the face,the needles on wrong so that the temp is reading incorrectly,you'll wish you never started!Then the needle will probably fall off after 20m and you have to do it alll again.You think lining Termis up is frustrating??!!!