Thanks, Tony.
Yeah, the foam really helps with the flotation after the fly gets used a little. Sometimes it's even more effective when the fly gets waterlogged and only held on the surface by the head with the body angling down a little.
The eyes are an affectation but the whiskers are there (and exaggerated) for a pair of important practical reasons. First - It helps the wake to emanate more from the front (like a mammals feet paddling in front of its nose). Second - It's another feature distracting from the foam by breaking up the stark outline. Kinda like a good duck blind - you want it to break up the outline but still be able to see through it.:).
For big Northern Pike (and I assume Muskies as well), I like to tie them articulated and with a 10" piece of 30 lb. Fluorocarbon installed underneath the front half (the same piece that forms the loop). It's a killer!!
I know you will put your own cool spin to it, but the only things I wouldn't change are:
1. Hook - TMC 8089 Trust me, you wouldn't be happy with the hooking performance of hooks like TMC 5263 or similar streamer hooks that most guys use.
2. Foam disk size - the size of the head has to be properly proportioned. For example, on a size 10 (these hooks are sized weird), I'll use a 40 caliber disk for the bottom piece and a 44 for the upper.
3. Rubber legs - They definitely add magnetic appeal, but big bundles of anatomically correct knotted ones don't seem to be as attractive to the fish nor are they as durable.
4. Tails - I haven't found better than the Vernille. Leather looks as good but gets too heavy when soaked. Artificial Chamois this thin is too delicate.
A few key tips: Glue the the disks in place before trying to tie them in. The edges of both should come right up to the hook eye or tying them in will make too big a nose. Don't use epoxy, it's too heavy. I like gorilla glue, but aquaSeal would probably work just as well.
The fly is very tough! This photo is of a retired one. I don't know how many toothy critters it caught, but it was a hell of a lot!