Infiniti X AWD Flex Disc, Driveshaft coupler, rag joint compatible part

Hello
In this video I share some difficulties I had with finding a part that works with my automatic AWD automatic Infiniti car with a steel subframe.
The dealer will not sell this part and will sell you a new driveshaft instead.
I Silverproject.eu's aluminium flex disc, but this was just a waste of money. This part needs your driveshaft to be re-balanced.
I also tried two toyota parts, one fit the other didn't. Both were claimed as compatible on various forums.
Further reading indicated if you have an aluminium subframe you get a different version of this part.
If you have an AWD Infiniti, with a steel subframe, and an automatic. The part that works is Toyota part number "37511-30020'.
Don't do what I did and keep buying parts until one fits.
edit: If you don't know if you have a steel subframe check your towing capacity in your owners manual. The steel subframe ones have a rated towing capacity of 3500lbs. Aluminum ones are about half of that.