I did think of wrapping it in barbed wire to make it look pretty!
Just finished installing the other one - couldn't be bothered with anchor bolts so drilled 12mm holes and used resin on the bolts! I have never tried drilling concrete blocks with an hss bit before - went in no probs - on hammer action! The hole in the steel was too tight for a masonry bit and as I had whacked the whole contraption into place with a large hammer I wasn't going to pull it out again!
