Great work everyone and thanks for the idea of using the Model X T-badge. I didn't see any tips on how to best install it so here's my ghetto rig below. Eventually, I want to replace the hood with a refreshed one so this way of installing that doesn't involve warping the front grill. Once I have the new hood installed, I plan on installing the original Model S T-badge again.
Cut off the end of the T-badge mount. This will extend over the latch if you don't and do not cut any further if you want to mount the cover back on the T-badge. Also be prepared to cut through the metal plate that's underneath. Don't mind all of the melted plastic... I was seeing if the metal plate was placed throughout the T-badge mount. (it is)
Next, I needed to remove the hump below the T-badge to sit flat on top of the grill. I did this with a soldering iron with cutting blade and you'll be able to cut down to the metal.
I then drilled through the T-badge to create a mounting point for the rectangular hole already present on top of the plastic grill and used a nut, bolt and washer to mount. By trial error, I marked the T-badge with a red dot on where to drill if you wanted the option of sliding the T-badge flush with the hood or slightly extended passed it.
The rectangular hole in the grill will allow about a 1/2" to slide the T-badge and after I aligned it where I wanted it, I then placed the cover back on the T-badge and called it a day. I included pictures of what it looks like flush and extended for reference. I personally like it a bit extended.
Lastly, a side by side comparison with the factory refresh.