At the same time, all of the above points may be true for any reviewer. Michael Green, audio magazines, me, anyone. Nobody should have the right to say she/he is better than the other one. My approach in such an even situation is that I will trust my ears more than someone’s who has significant investment in the problem. I may be wrong, but so may others.
My case, point by point.
1. Actual disassembling of the amplifier was so simple that it left no room for error. Cover off and out of the room (I actually did that on purpose).
2. I used the fist around the screwdriver. Otherwise, I am not the best for the finest fine motor work, but this required nothing of that kind.
3. The whole point is that even the lousiest system can reveal differences. That is why tweaking is done, I think, and old Sherwood receivers and similar items used. Mine is nothing spectacular, but it works in general. It shows differences when a piece is changed.
4. Everything seemed to be working as expected. No hum, buzz, nothing unusual.
5. I doubt that, although it is of course possible. I hear all the frequencies with a small dip in acuity at 14000 or 15000 Hz (I forgot which one it was about two months ago) and have no hair over the ears.
6. That one is hard to measure, but I, in fact, wanted to hear the difference. If anything, I was more biased towards confirming than rejecting the hypothesis. Aside of that, there was another pair of ears (much younger and completely unbiased, practically not even being aware of this thread) that also could not hear any difference. I have left that fact out until now to be one to one level comparison.
7. The day was beautiful.
Points 8 and 9 are impossible to evaluate for an ordinary person. Tuneland experts and me included. We have to assume that those were equal at the time of testing. Next stop Bora Bora. Everything sounds better when the floor is of volcanic origin. Much better than maple.