Slow Cooker Corned Beef / Reuben Sandwiches

I'm not a big fan of cabbage so I used sauerkraut instead and made tastyass Reuben sandwiches!

4 lb corned beef round (comes with spice packet)
10 small red potatoes, chopped (I left skin on)
1 white onion, chopped
1/2 bottle/can of beer
3 c water
(optional) cabbage, chopped
(optional) carrots
if making reubens: 
sliced rye bread
thousand island dressing
swiss cheese, sliced

DIRECTIONS: (7qt slow cooker)
Place potatoes and onion in bottom of slow cooker, add in the water, then place in the corned beef and pour the beer over. Sprinkle the spice packet over everything.
Cook 8hrs on low or 4hrs on high.
*Slice meat against the grain or it wont be chewable*

for reubens:
Preheat oven broiler.
Spread thousand island dressing and sauerkraut on each piece of bread, top with swiss cheese and sliced corned beef.
Place under broiler for 2-3 minutes. Combine bread pieces into epic sandwiches.

more photos: