drum brake question

[dzbowtie]

hey guys, ive been fighting a bad brake squeel in the front driver side drum. there is no noticable issue while driving, but when slowing down, there is a loud high pitched squeel. its only front the driver front. the brake shoes have been replaced on both sides. the passenger side was rebuilt the same way as the driver, with no issues. shoes are new, drums are new. is this an issue having to do with the shoe adjustment (either too tight or loose?) while adjusting the shoes, both sides felt like they were in the sweetr spot (slight drag). but when touching the drums after driving a short way, i know not the best way to test, the passenger side is hotter than the driver side. ive adjusted and readjusted several times but the squeel is still there only when slowing down. any ideas would be greatly appreciated. also, the hardware is probably the original, but nothing looks out of place. bad spring tention? adjustment not holding its place? really at a loss at this point...