Good one !! I've always wondered what Rocket Scientists say
I usually attach a roll of gaffa to my belt loop with a re-usable cable tie. Saves hunting around for it all the time or leaving it on top of a tube to be fired into orbit. I can also slip a bundle of cable ties (with one securing the bunch together) through the hole in the roll to keep them handy when rigging.
Good idea to carry a magnet on a bit of string for getting scissors/pliers etc out of tubes when you've dropped them down inside - much better than dismantling the rack.
Chris B