Thanks guys,
I'm not going to deviate much more than I have from the basic F-15B/E, except for the weapons fit. In a 'mystery box' of kits I got the other day was a 1/72 Hasegawa F-14A, I found that it had the wing glove pylon adapters for the AIM-54s it could carry on these stations. I'm going to use the adapters for the AIM Martels and position them on the conformal tank right where the main hanger is for the MERs that the F-15E prototype had. It seems to position the MER/adapter right about the load cg, judging by where the rest of the F-15E load is.
I'm going to go with two pylons per wing, the main ones will have the tank and two ASRAAMs on each, and for the outer pylons, a twin AIM-120 set-up. While looking through my spare decal and instruction sheets that I keep, I found I have a 1/48 instruction sheet for a Monogram F-15C. Odd because I've never built one (or even had one for that matter) and for the life of me, I don't remember where I got it from. Anyway, this instruction sheet shows an outer pylon with an ECM pod on it, so now I know what the pylon looks like and more importantly, where it went!