Authentic Airliners is about to release their update set for the Revell 1/144 737-800. As you know the kit engines are based on the -400 series engine nacelles. Contrails do an engine replacement but can be a bit rough. Knowing the work Kurt does, these should be a great addition.
http://www.authentic-airliners.de/IMPROVEMENT-SET-B737NG
I have no association with AA but have a few of his kits and can advise they will be of a outstanding quality.
Capt Stu, any idea if Virgin will update the winglets on their jets with scimitars? Ray/Salty will QF do the same? Apparently it saves 2% in fuel burn.
Here is an example if a scimitar winglet on a 737.
I think they look good. As Dylan alluded too earlier, someone will knock one off with a truck.
Cheers
Tony