Hi, Nytram.
Apology for not being able to provide you with the short instruction for doing the Oil/filter/MTF replacement. I need to finish Chris's Health Check Report first while doing my main business and working on another NSX at the same time.
Yes, you are correct. From quite a while ago, we were no longer able to purchase the tall body filter from Honda. Just use the shorter one and I normally replace it at every oil change interval.
If you are doing the MTF, it would be best if you can try to check the strainer as well.
Be careful not to break the fixing tab of the strainer cover. There will be lots of corrosion (you can't see it until you remove it) at the strainer cover making it very difficult to remove unless it was treated in the past.
You may find some metal powder inside the strainer which is not unusual.
However, if you find any metal pieces, then pay extra attention to your shift feeling and be prepared/plan for O/H in the future. Any big metal debris will be trapped by the magnet next to the oil pump housing before reaching the strainer so it's just a brief health check.
Please use MTF-3 from Honda, if you don't track your NSX.
You need just below 3.0L (about 2.7L) so try to bring empty container with you when visiting Honda. Don't buy the 1.0L ones individually sold at the dealer. Just ask them to pour 3.0L into your container from the dealer's 25L one. It's cheaper than buying the 1.0L ones.
Oh, and as others suggested in the past, make sure to loosen the filler plug first before draining the MTF. I never had any issues but if you can't open it, you will be in trouble after draining the MTF.
Regards,
Kaz