Hi Richard,
do you know the origin of your WC and the origin of the CB parents? In my experience the yellowish green are from Kenia or Tansania and the dark green ones are from RSA. So they maybe donīt really fit together in the first breeding attempts. On the other hand I know people who bred with mixed D. polylepis couples from East-Africa and RSA. And D. polylepis are really different in their apearance and their natural habitat in these both origins. If somebody should cross these different lines, well thatīs a discussion
Bests
Frederik