[G] TvP Deterministically Dodge Scarabs

12 - I believe the armory and academy are interchangeable here. Note that this is a large enough wall that you can stack SCVs and dodge without maynarding to another base.
6 - Again, the wall is large enough that SCVs can dodge in place, but beware of splash.

1 - This is similar to Hearbreak Ridge 3 o'clock. This is a very good wall against 5 o'clock and 7 o'clock, and an SCV (default CC rally point) can fill the gap between the CC and factory.
5 - This position takes our opponent's location into consideration. The upper wall is best if you expect the shuttle to approach from the north. The lower wall is best if your opponent approaches from the back.
7 - The armory does not interfere with gas mining. The factory rally distance is notably longer: you can also use an academy to the left of the armory, but the scarab is more likely to slip through the left this way so it takes more micro. A starport would be ideal.
11 - This is a tough angle to defend, but you can fight from either side. I wouldn't recommend placing an SCV in the CC factory gap unless you are below the wall, since you won' t have room to maneuver left if you're on top when the scarab takes the shorter path to the right. To put it simply, you want the reaver to be on the concave side of your wall.

3 - Note that the default rally point on the command center blocks scarabs from passing between the factory and command center.
6 - The refinery-factory gap is zealot tight, but not scarab tight.

1 - This is so simple and provides tons of coverage. The factory does nothing here (unless you move it one matrix right and let an SCV fill the gap), I simply forgot to move it out of the image.
4 - Another good wall, same as HBR. SCV can fill the factory CC gap. Use a starport if you don't like your factory this far in the back of your base.
8 - You can do the factory and armory to the right of the refinery, but I just wanted to note that this is one of the few maps where the armory is tight against the refinery and minerals.

3 - The armory below refinery is scarab tight.
6,9 - Haven't thought of anything good for these yet.
12 - I believe you could alternatively use the armory to seal the mineral gap and move the machine shop against the minerals.

1 - This position doesn't have any worthwhile configurations for the 1-base reaver timing we hope to counter, but if for some reason you find yourself in this awesome spot, just know that an SCV blocking the turret/armory gap makes this tight enough that you can continue mining as usual - scarabs only make it around ~10%. A factory and SCV below the CC would make this even stronger.
5 - This position isn't as great as its HBR and Moonglaive analogs, simply because of the gap in the mineral patch. You can go for the same wall in, but I mixed it up here and walled on both sides of the mineral.
7 - Tornado really sucks for scarab walls. Unfortunately, the cliffs aren't scarab tight, so don't hope for much in this position.
11 - This is another "standard" wall with just a factory and armory, but I included the turret positioning to give you an idea of how powerful this configuration is. The shuttle cannot land the reaver without taking turret fire and an unsieged tank has ample space to maneuver . You can go even further with supply depots to make it harder for zealots to get around, but I hope you get the idea.