Once I did that, and replaced a few caps with low-esr types, it became the only Delay, effect really, that sits in the FX Loop on my TSL. I use a Gold Pin JJ ECC802 and sounds phenomenal. Mind you I also have Maxon AD-999, bias-adjustable DOD FX96, Guyatone PS-006, Arion SAD-1, and Pigtronix Ecolution Filter Pro II. The TDX tops them all, and the tape-delay sounds are second to none. Unlock its potential by removing that diode-pair and using a low-gain valve and see what it is I'm taking about.