I don't do false modesty. If I tell you that I have the DIY skills of Frank Spencer (ask your Mum) and the electronic engineering capability of Homer Simpson, then I'm not just looking for a cheap laugh ... I mean it. If I can replace the valves on an OBT, then so can you. [b][size=4]Why replace them?[/size][/b] 1. No one ever gets to turn the knobs above "nine o'clock" because the amp is so damned loud and the valves have so much gain. 2. No one likes using the [i][b]D.I. Out[/b]