Woof, woof.
I am glad you love your Yairi. Fender amps and guitars have been an integral part of my life since I got out of HS in the 70s. I have nice equipment, I love my Spaghetti Stratocasters and BF, P2P toys. When someone mentions having a problem with their gear I don't turn into some snide a-hole with a chip on his shoulder. It seems more rewarding to lead that person to the proper, vintage amp tech or best guitar man in the area.
Speaking generally, why exactly is it necessary for said a-holes to chirp in with lame, condescending and non helpful comments in response to an honest query ? Why indeed ??
Peace - Mo'