I'm doing it without all the NDB stuff (which is fine).
It may be fine while you are doing the course but, as most ILS approach procedures have an NDB as an initial approach fix, the fix for the hold, and the fix for the standard missed approach, as well as the NDB approach being the most common alternative approach when the ILS goes off, then your 15 hour IMC Rating isn't of much practical use.
MJ
Ps Kevin, Just do the IMC, you will never regret it, but insist that you do both ILS and NDB approaches as part of your training, then you will be proficient in the two most common approaches. If you do this though, it will take you 20-25 hours in my experience.
MJ