That looks like you've done a good job there.
I never did get on that well with soldering, although I did design and build my own Oxygen senser based on a quad op-amp circuit. Grabbed the wrong end of the soldering iron a couple of times though
I looked into the
MegaSquirt DIY kit, but I don't have a steady enough hand to do it myself*
Any ECU I buy is going to be pre-assembled
*I have some residual nerve damage from a diving accident, at times, I get really, really shaky hands - no, it's not the drink
