good observation Redcap.
I remember reading what Henk wrote somewhere @ thecoop, with reference of hom I/I will subtlety turn ground colour a yolky colour, I agree with him on that on the few examples that I had, yet I/I+ individuals where/are much stronger mahogany, hwoever i have found (not huge numbers to be statistically relevant) but anecdotally these individuals show more black ticking.... could well be a situation of ****** if you do, ****** if you dont