I have a Fender Bassman and also a Wharfedale/Albion mini-stack with a sealed cab and I much prefer the open-backed sound. I also have a Klemt M40 vintage head and have been looking for a decent s/h open backed cab to go with it. However, I've go the chance of getting a Hartwood 2 x 12" angled cab which I really like the look of. Not daft about the ceramic speakers (I'll deal with that IDC). but I'm asking the experts on here about porting this cab. What's the best and easiest way to do it?