DaVinci 1.0 Extruderotomy

My DaVinci 1.0 extruder was grinding up filament
so decided to dive in and clean it up
Which turned into full fledged surgery

That dingus atop the extruder has nothing to do with loading filament
It is the release for the extruder
-- Remove filament
-- press it down and pull extruder assembly up and out

Atachment 1

-- this shows the extruder board separated from drive wheels

Attachment 2

This shows gear on stepper motor and idler to push filament
idler has light and dark segments but I didn't notice sensor to use them

Attachment 3

Here is the hot end
Attachment 4

The thermistor came out ( held in with RTV )

Attachment 5

I heated the hot end to 220deg C
Drilled out stuck filament with drill smaller than 1.75mm
And used 1.75 mm plunger to expel all ABS in hot end
I reinstalled the thermistor with some Hi Temp RTV
and aluminum and kapton tape

In all the twisting of wires -- one of the wires to heating element
broke off right at ceramic
I installed a new heater slug (after a lot of grinding out of the hole in hotend)

Looks like all is working well -- have to reassemble it all
and wait to see if it will function
and
just plug up again