You might want to give Terry DeWick a call about your Mac gear.  He seems to be the man for Mac rebuilds, but I'm sure you know that.  I would hate to see a cap let go and toast the amp.  Now that would be 'spensive!Glad to hear you like the Altec gear as well.  I got my first Altec's about 6 months ago.  They are A7s with redone GP drivers.  Very nice sound.  Also, just got a beautiful pair of Altec Magnificents (A7s in furniture-grade walnut cabinets with wood grill) this weekend - thanks Zincman!  Not quite showroom condition (an honest 9/10), but pretty damn nice.  Hope to have pics up in a few days.....Colin