I have a caramel project but I think it's because of the potential genetic issues, lol.
When I bought my original 66% chance het male around 1999 I of course hadn't heard of the kinking issue or more recently the egg problem with homozygous caramel females. Took me forever to get eggs from him and forever again to get the three daughters up to breeding size (I'm a crappy feeder). I didn't even have a caramel gene male to try them with but then in 2010 a friend who had read my speculations that there might be an environmental variable behind how likely expression of the caramel kinking tendency is gave me a pair of 100% hets. So I'm trying the 100% het male to the three 33% chance het females and will eventually breed him to his 100% het sister. If anyone has any suggestions for anything I should do different with the gravid moms or the eggs just in case I hit on a caramel I'm all ears. If I eventually produce a caramel female then I'll have to decide what to do with her; probably keep the first one and experiment with ways to get good eggs from her. Hopefully someone else will come forward with a solution before then.