egg production trial?

I do not enjoy lots of record keeping but now that I have finished hatching and selling eggs for the year, I would love to find out which Dominique hen lays which egg and how often she lays in a given time period.  With 3 different lines I do not have a consistent egg type/size yet and now that I have my birds looking more like I would like them to, I want to work on their egg production and quality.

So, I have set up 2 wire show cages in the henhouse and put a hen in each tonight.
I plan to record how many eggs each hen lays and the quality of each.  I may even break each one open to check for blood spots/ meat spots and yolk color/quality.

I would love your opinion on how long I should keep each hen in the cage for a fair test.  I feel like the first day, they may hold onto their egg because of being in the cage but then the next day they should "have to" lay an egg.  I know they may temporarily stop laying from the change in location and/or stress of being caged so I figure no point keeping them in there more than 3 days?
Otherwise I would have to wait a week or so until they settled down again  to be a fair test.

Maybe create a point system for their egg quality and their egg quantity and tag them each accordingly?
Any other ideas to make this test fair and reflective of their egg performance?
Anyone else done this at one time or planning to do this with their breeds?
Any suggestions would be much appreciated!

So, you dont' want to know how often, or how many, just which one and the quality? Well, that should work.

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A few days, or even a week, won't give you reliable results, for total eggs laid, blood spots or yolk quality. Natural (random) variation is large and will overwhelm any differences in that short a time period. Besides, keeping the hen in a wire cage will cause her stress and is likely to influence her laying, and her egg quality.

I so hear you about record keeping, but it is a necessary evil in my mind. 

What about if you use the old food colour trick (a few good drops in the vent of the hen) every night for a week on the ones you're recording? That way you wouldn't have to remove anyone from the flock (no stress) and you'd definitely know who was laying which egg and when. Only thing is it'd be a bit of a pain because you'd have to reapply the colour every night or two (not sure how long it lasts) and whatever you do, use red with extreme caution because it'll look like blood.

Thanks for the comments, I agree that like other tests this may not be a true picture of the hen's laying ability but I am going to do it anyhow as I guess most of all I would really like to know if the hens that look good (to me!) also lay good eggs!
If I just set the perfect eggs at this stage, I may be narrowing my gene pool too soon? Or I may find out that pretty is as pretty does and the less attractive hens may be the best layers....

well this is the fourth day of the test for my first two hens, and so far they have laid 3 eggs and 2 eggs respectively, I wonder if now the stress of new surrounding will affect them more so maybe 3 days is long enough to get a mini picture of the size and type of egg they lay.