Finally got around to buying one of these beauties - for those not in "the know", it's the world's ultimate pullthrough, with a pricetag to match (about 15 quid): It's a cord with a weight on one end, and then has a thicker bit with an integrated phosphor bronze brush. You put some solvent on the start of the thick bit, pull through, and that's it. A really skanky barrel might need 2 pulls. It's even machine washable. I'm never going back to a rod, brush & patches!!!