I was just recently looking into this and what I gathered from all of the threads on here is that any batch 10 gallons or less... you can just double the recipe. When you scale recipes your main concern is hop utilization, but you won't experience enough of a difference for 5-10 gallon batches. Mash/boil time remains the same and you will have to increase your sparge volume accordingly.
Primary 1: IIPA(Simcoe/Citra)
Primary 2: California Common
Secondary 1: Infected batch with Lactobacillus
Bottled: HBC 342 XPA, WLP670 Saison
Kegged: Orange Blossom Honey Ale, Red Ale
I shotgun heady topper.