Welcome to the Brethren. It's sad that you have all that great Weber equipment and can't use half of it. I hope things go well with the mini. I find mine to be one of my most versatile cookers.
As far as the butt, I think it was too small. That gives it a lot more surface relative to weight which could make it dry out easier. Get a bigger one next time. (And turn down the tunes in the wee hours.