Well Doug,
I have built many things in the past. Gary is my brother. I think the question is, What is the next amp. I think everybody will be surprised. Even if I did other adventures my main study is the way you here music from a spatial aspect in the room you live in . Amplifiers have always been exciting to me. The quest is to take the best amp and beat the pants off it at 1/3 the price, I remember getting that lecture from John Iverson and Don Frick. I have had about 9 years to go listen to what is considered the best. I just hope everybody will enjoy music again. Most amps sound electronic and not musical. Most amps strive for low distortion figures but that is not where the musically comes from. The 25/25 is a prime example of that, still in demand to this day. The real issue is the parts that are manufactured today including the transistors and fet's ( not as good as everybody thinks). As my engineering professor use to say, count the parts that is what could go wrong. An Amplifier must track the music and not try to fix it. In the circuits we find many distortions., but those distortions, must follow the distortions in open air. In other words, listen live those distortions do not seem to bother anybody at the Concert Hall. Maybe nobody can follow what I'm saying but music is not a dry lifeless sound, music is full of life and is free flowing.
John Bedini