Here are some masters that I've made for the Tigers radiators, and fuel tanks. I've made a rubber mold, and cast the parts. I don't plan on opening up the access panels on the engine deck, but there would be a gaping black hole into thase grates, and the tank would just look incomplete if they weren't there. Anyway, I plan on doing another Tiger, that's in the middle of an engine change, so the detail will come in handy.
I'm also toying with making my own photo-etched parts, and have started making artwork.
Here's the artwork for the turret, I manipulated a picture in photoshop to get the mamoth artwork. I still need to make the number "100," and the German crosses. Fortunately I have an Alps printer, and can print my own white decals.