I invite you all to smack around Dobbscoin a.k.a. BOB, some.  It also uses KGW, has the fix in the OP applied, but it's running some settings we like to call BOB's Wormh0le, with a much smaller event horizon window.  Not intended to be the be all end all answer...  It's still KGW.  But putting something a little different out there, that we might be able to learn from.  Yeah, there is practically no hash on the coin, so it won't take much to hammer it, so try not to hit it too hard and just shatter it.  Though, at the end of the day, we're not trippin.  Checkpoint, increment versions, rebuild, release...  It'd be nicer if you didn't try to completely ruin the fun for everyone.  I'm thinking we're most susceptible to a difficulty walkup.  Haven't really tested it.  Figure some of you all might be better equipped to accomplish the task of exposing flaws with excellence.  BTCBob will probably get mad at me for posting this.  But hey...  Anyone down to hammer the h0le?  Heh heh...  Them other Bobbies will probably freak out if they see some huge diff spikes... LOL

Dobbscoin Homepage

Latest Dobbscoin Release

Dobbscoin Source

Dobbscoin Block Explorer (might be interesting to compare to Auroracoin block explorer)

Dobbscoin Home Pool

Dobbscoin SMF

#dobbscoin on FreeNode

P.S.  Though BOB has Coingen roots, Testnet does work.  So that's always an option.  Though the seed node can be wonky at times.