yes
but just to be sure and to make it easier I overdid it. If an exchange waits for 6 confirmations, you would only need to split it in 6 (maybe 7, not 400 like I did).
I'm researching more advanced stuff like brute-forcing the stake modifier until I get 6 blocks in a row with a high probability of winning against the main chain with much less stake.


thanks... with this technique alone, I could do Reddcoin (26 in coinmarketcap, which includes ripple and other stuff) for 12k USD or about 60BTC - less than 2% of market cap. Still too much for me...

the method is simple, and the only modification to the client was adding the ability to stake without publishing blocks (and then publish the private chain all at once), and to enable/disable listening of blocks and tx from other nodes. This allowed me to spend on one node while using the same coins for minting a parallel chain on another node.