Joe, I understood what you meant.
Donald will be a bit more clued up on this because I know he reads a lot of the 8weeksout stuff but a few things I've noticed:
Joel seems a little ambivalent towards kettlebells. I can't remember the name of the method but he has those intervals where you hammer it for 12 seconds then recover for as long as it takes to get your heart rate back down. It hinges around his view that everyone has different recovery rates and therefore something like Tabata (or indeed any other interval protocol with fixed recovery time) becomes cookie cutter. He favours the spin bike on high resistance. Someone asked if kettlebells would be appropriate (say swings, Russian or American depending on your like see my tedious posts elsewhere
). If I recall he didn't think you would get HR up high enough, quickly enough in the time frame.
I've also seen him asked about C2s and he said he had little to no experience with them. I feel there is a lot you can do with a C2 if you want to tune up your engine. On the other hand Rob Shaul of Mountain Athlete/Military Athlete disagrees and feels they have little carry over for his guys.
So we have a few ideas that cost $$$$. Something that can be overlooked with Ross Enamait is his very firmly set low tech approach to training using equipment that is relatively available. And despite what many say Ross is not all out, balls to the wall every time you train by any means. I really like a lot of what I've seen from Joel and it's good to see aerobic work promoted again. Some of us aren't Rich Franklin though, are we?
Just to clarify on my two masters comments: we can get all funky with the hormonal impact of training but a big element is going to be how the fuel gets used. It's perfectly possible to get stronger and run, it's just not optimal for size gains or massive increases in strength. But that's not what you're looking for so go for it.