At 00:29 04/06/2005, you wrote: >They're a bit like the good old Q-max cutters (now that is showing my age >[1]). > >[1] The first 3 I ever bought, over 25 years ago, were 5/8", 3/4" and >1+1/8". Why? > >-tony You were building a Mullard 5/10 valve (tube) amp! Richard