Thank you Barry. I'll try to do this soon. Two questions before I do:

a) With my previous Rapid Omega 100, I had great trouble taking those 3 screws off. They were too tight, or maybe I didn't use the right tool. Anyway, what can I use to loosen up the screws...will Liquid Wrench work? How about WD40?

b) Once I have the top cover off and I've re-clipped the spring that came off, how will I know I've repositioned the gridline plates correctly? If I don't put them in the right position/ composition will be off, correct?