I believe that might've been me:
I put pieces of 2x4 spanning 4 trusses at right angles every 4 feet and bolted up through with 3/8ths threaded rod. I've lifted some stuff heavy enough to make me nervous and it's never moved.
Man! I really like that set up. That just looks too handy! My set up will work for the job I need, but boy that really gives you some flexibility. BTW, my chain hoist arrived today! Woo!