What I learned fixing printheads & refilling ink on HP Officejet d145 printer

What I learned fixing printheads & refilling ink on HP Officejet d145
printer is going to go into this thread.

I broke a lot, spilled a lot, cursed a lot, and tried a lot ..... and I
just want you to benefit from what I learned so I'll try to put it in this
thread.

Please feel free to interject what you've learned. The hope is that this
thread helps anyone who has an HP officejet d145 printer who wishes to
refill seemingly expired ink tanks and resurrect seemingly dead printheads.

I'll post pictures and describe the process and reference URLs on the
Internet in subsequent postings. Stay tuned.