As with anything hand made, you will find many twists and variations on flies. Best thing to do is "google" Maynards Marvel and then choose the tyers pattern you like best, copy that picture and bring it to your fly-tier to have them match it.
I use a variation that has black and white "cheek" feathers, yellow body feathers and orange "hook wrap". When using a tandem, orange or red beads on the connecting wire.
If you look online, you'll see some variations don't even use feathers...
I'd post a pic, but I'm late as it is.