Of the three tanks I use two of them are the Paterson Tank System4, which I prefer to the newer "bayonet funnel Paterson tanks" these two I use for 120 with with two rolls on a reel. The other one is an AP two roll (135) tank, I like it's reels a lot for 120 since the loading flanges are a lot wider. The normal Paterson reels get used for 135.

I never could get the hang of ss tanks (I have 120 & 135 Nikor tanks & reels) but after screwing up a couple of rolls I have put them in storage.