Wow, lots of good info. Really appreciate it!
I do have the 1000ml measuring cups at the dollar store. Fantastically cheap and they work!
Sorry, I realize I made a mistake... it's not a Super 6... it's a Multi-Reel 3 system. I don't know if this makes a difference.
Anyways, based on what I've read throughout, this is what I should probably do when I develop my next two rolls. Once my film is loaded onto the roll and I put the reels onto the center column and cap it with first the funnel and then the rubber cap...
1) Make sure I put all 3 reels onto the column to make sure there's no movement of the 2 loaded reels (which will be seated as the bottom two reels)
2) (maybe?) pour tap water into the development tank that's at a similar temperature to what I will be developing at for about 5 minutes
3) Start my clock (for me, it's 12 minutes and 30 seconds) and pour in my developer. Then quickly agitate using the tank's spindle 10 times in 10 seconds - once clock wise, once counter clockwise, once clockwise, etc.
4) At the end of each minute, invert my tank 4 times within 10 seconds (so 2.25 seconds per inversion... approximately).
I think that just about covers it? As far as I can tell, I don't really need to go to a smaller development tank that holds only 2 x 35mm reels.