I've abandoned strip testing. For those who use an Enlarging meter of who's ever manufacture the step up to full size
prints is simplified. Dan
I don't use test strips very often. Instead I cut a piece of paper into 2" or 3" squares, estimate the exposure and try it on an area with a good range of tones. After two or three of these 'test squares' I am usually there.
I bought a Paterson enlarging meter a few days ago for £2. I haven't had a chance to try it yet though.