I was able to get PoW and PoS working.  The PoS timing is too fast right now and the reward is slightly less than what it should be.  The PoW block spacing is okay (using Dash's Dark Gravity Wave) but is slow to adjust the difficulty.  After those issues are fixed, I will move to testing masternodes, InstantX (named FastSend in Sling), PrivateSend (named CoinMix is Sling), and voting/budget blocks.

This is the project board with my progress:  https://waffle.io/slingcoin/sling-market