the x years you are tokking about is something like the breakeven year.
This is very different from what you have said below.
Based on 6.5% increase per year, and 4% rate of return, every year you delay your drawdown, you require to live 21 more years to get back the money that you forgo during the first year.
62 +21 = 83. i think i may not be able to make it to 83.
So, i will probably not delay my drawdown.
if you delay till 70, you will have to live up to 62 + 8*21 = 230 to make up for the amount lost during the first 8 years.
My calculation is based on the same bequest whether you delay your drawdown or not. Can this be assumed?