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My understanding of the problem is not that the IAC motor fails and goes low resistance, it's that the coolant passageways near the IAC (to prevent throttle plate and IAC icing) corrode and let coolant get into the IAC motor, which subsequently shorts the motor out and presents too low of a resistance to the ECU driver, which is not properly protected electrically. Before my Pathy engine died of lifter death, instead of replacing my IAC, I was just going to bypass the coolant loop through the throttle plate. In those threads you should have seen several references to people successfully doing this without issue. In theory you could run into a throttle icing problem, but no one has reported it. Unless you are in a very cool and humid environment I doubt you'd have a problem. Hitachi is the OEM for many parts on Nissan, but I'm not sure for the IAC. Who was saying bad things about the Hitachi IAC? Did they for sure buy it from a reputable source and not a 3rd party Amazon seller that stuck a fraudulent label on it? I've used a good number of Hitachi parts including coil on plugs, and alternators, and haven't had a problem. You should have zero problems if you want to replace it preemptively, install it correctly, and use a OEM or Hitachi part. You do need to run the idle air relearn procedure. After this many years there is almost 0 chance that a new part has the same electrical characteristics as your old one. Do you have the service manual? It has the procedure in there. If the above is correct, then replacing only the motor wouldn't make sense.

Having worked in the auto industry ~3yrs, one thing that is very common (unlike other manufacturing industries) is how supplier dependent the auto OEMs are. Auto OEMs make a steel body, with an engine for the most part. Nearly everything else is from another company, including OEM owned subsidiaries. It's not uncommon for one model line to have the same part, manufactured by multiple suppliers (e.g. an alternator with exact same specs, could be awarded to Denso and Bosch, with one filling in for the other during the same year) - that's just a hypothetical. There is no perfect auto OEM (no matter what Elon thinks) so kudos to Toyota for acknowledging it. As someone said, Nissan (the same Nissan who had to perform the R50 rust recall) maybe just isn't as proactive in acknowledging things... ...unless you embezzle millions of dollars and abscond to Lebanon.

Steering extension is supposed to be from a 91 Honda accord. Going to try this method next week once I finish my sfd kit, I've read mixed things so we'll see how it goes!