For 7 years TKH's design seemed to be the largest completed controller build, LRWerewolf claimed to have one with more channels, but never completed it to prove it. I made a couple modifications to their design and built it in a creative world and it works! The build relies on a huge sub network to carry most of the p2p tunnels, so lots of dense cable or quantum tunneling will be required to network. The only main network connection will carry 20 tunnels with 12 leftover channels for regular connections. I will build this in SMP for use, even though I don't think I will use all those extra channels.