I built this one several years ago. Considering its age, it has held up OK in my books. 

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It's the Heller kit with decals I had gotten from Leading Edge. I wish I could get a new set for my CL-215 but they're out of production now. It's a shame because the model really shines in Canadian colors, especially the orange and green of the ex- Newfoundland birds that have been used by Buffalo Airways. I did one in that scheme for a friend, now I wish I'd kept it!

Other than the decals there was nothing really special done, other than changing the drop door profiles. The 215 had 2 large doors, the 415 has them separated into smaller doors. 

Harv