Must admit I've not done much co-writing. Occasionally Zombie45 chucks me an idea and we've had some success with that method (short story coming up on Weds), and I did a poem with Warrior_Prophet, but I'm not sure my brain's wired right for joint projects. Having a break now as Merlin's Gold is finally done, well apart from the next two years worth of editing....
What was the co-write you did with Christian, have I read it?