update... after a lot of fretting by me, Binky appears to have eaten (either that or the crickets escaped). i've also had some tips from the woman who sold me two of her baby geckos a couple of weeks ago.
so today i have played musical geckos... Binky has now moved out of solitary and joined Boo and Luna (the two baby ones bought recently). Cav has been upgraded to the bigger viv to join Kelly (bought at the same time, but bigger) and Patti (mother of Binky). Ray (the dad) is on his own for now, but has a nice shiny light canopy.
this is Luna, Cav and Boo yesterday - the small ones are approx double the size of Binky