Glyptal, if you can find it anymore.... but unless it is *really* loose, I'd be tempted to just leave it be. The less messing with such stuff, the better. And of course, now you know where the tweak is, it's trivial to adjust it again and then seal it. The problem with sealing is... if some thing in the focus or HV chain is drifiting badly, and you gunk up the focus pot, then, after repairs are effected, you have to un-gunk the control and adjust it yet again. In my experience, sometimes these things don't take too kindly to being messed with a lot. Cheerz John

On Sat, 7 Apr 2001, John Lawson wrote: Well, maybe. In a case like this, the better approach is to apply just a dot of glyptal (or nail polish, for that matter) to one side of the adjustment rather than 'paving it over'. That way any required future adjustments need only to crack the dot rather than remove it altogether. - don