Yeah I totally get the supply chain. I have a dedicated coworker whose only job is to order and find old parts. And I am just trying to get ahead of the game before he brings me units. Well as long as the schemos are somewhat available I can figure it all out myself. I'm starting with his TFM series amps. Heck he has no idea of the status on most of them, he hasn't plugged them all in at all. Of the couple I've tore apart in the past years, the solder work seemed to be horrible