Found the spring that obviously belongs to brew head. Tried to install and threaded insert is being troublesome. Flat stubby was going to chew it up. Is there a special tool or something to recommend??

If you don’t have a wider flat head (most tool sets don’t have a wide enough one), you can use a coin held by pliers. I think pennies and quarters worked, but I can’t remember for sure. I use an impact screwdriver bit set that has some very wide flat bits, I just put the bit in a socket so I can tighten and loosen it in a controlled way.

Thank You Espresso Resource NW. Everything back to clean and functional. Still learning after 7 decades.