First the Irvine is a gay red now the OS is a gay blue. West engines gay purple? What about that new JE 56?
I don't mind engines when they are silver and stuff except the dull MDS look. Personally I think the OS blue is ok, if you have a cowl over it I don't suppose it matters much. Still have yet to try an OS. I don't need any engines, I have an .46 and .53 both Irvine. The .53 is booked for the Capiche but if I don't get something for my .46 it'll decompose.
That's why I designed my own design funfly, hopefully simple to build may flat sheet sides etc etc