Yes Im the same Kurt who did the tut.
Glad you have solved the problem... Boooleans can be very tempermental at time... I had some models that no matter what i did booleans ouldn't work even though i know everything is set up right.
Good luck the rest of the tut.
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)
https://www.artstation.com/kurtb