Fred,
I'm not trying to FUD here either. But could you explain your rationale for only allocating 20% to the POW? And 50% to the POS? I think it should be the other way around, or at least 30% POW.
With only 20% POW you won't get a very fair distribution and come launch time it will be mostly investors holding roughly 70% of the coins. Imho, you won't get a good distribution with this model and the coin won't really get off the ground.
The investors going to have 30% of the total coins. That's 33.3% more than distributed with PoW. This is Okay.
20% allow serious miners to jump onboard instead of potential dumpers.