Glad to see you do the Fido retirement session,  I found it very useful.

A couple things I didn't like about the scenarios are:

• modeling intl investments, it uses old US data, the world is very global now
• Health care costs,  does it have the right cost growth for the next 20+ yrs?
• inflation/ cost of living..

That being said it is the best calculator I've found.

Other concerns, you claim that you could stay at your job until 55 or 57.  I don't know of too many places that will guarantee employment.  Loosing that high paying job too early will impact your situation.  I've seen too many companies adjust their workforce due to age, getting in mid 50's..  something to consider,  I had 22 yrs then out..

I would increase the intl exposure, unfortunately the estimators don't treat Emerging markets very well.  The EM of 10 yrs ago is not like the BRIC countries today.  Having 20% of my portfolio in markets that have averaged 40+ % for the past 5 yrs has changed my situation.

Read, study, act, then repeat...  The people who lose are the ones that go to sleep at the wheel,  auto pilot..