1 etr102 2 weeks ago Hey everybody,I have a Gretsch Electromatic Pro Jet. Made in China, from about 2013, with a Fender/Gretsch's version of a tune-o-matic bridge. I had to remove and reverse one of the saddles to get the intonation correct. Great neck, overall this guitar was a bargain.One glaring problem tough. For some reason when I play at high gain and high volume, I get this ear piercing screechingly high pitched feedback. I'm a classic rock player, I know what healthy feedback sounds like, but this feedback is absolutely piercing , like having an ice pick hammered into the top of my head. It seems like it may be some kind of issue with the pickups or maybe the pots? At lower gain, or lower volume, the problem doesn't seem to happen.For reference, I'm using a Traynor YCS50 all valve 50 watt head into a Traynor 4x12 cabinet. Traynor is very well known in Canada, but relatively obscure outside of Canada. I don't use any overdrive, boost, etc pedals. I simply only use the gain knob on my amp. I don't have this screeching issue with any other guitar in my rig.Any ideas what could be causing this and what can be done to fix this? (short of just using less gain)?