I fear what will come out of me saying this but this can fit another taco easily and probably a second with some difficulty.
I used to think this was tougher then the original, With Dgriff's records, I no longer think so. The extra block here cuts down on just enough wiggle room in the original to make this route something I think most people will find on the way to the original's solution.
If you can get this you're at least somewhere in the ballpark!
Insights