I'm sure this has been done, but I can't find anything through the search.
Here's my set up: I have a 5 gallon pot so I usually do a partial boil, and top off at the end. I always partial mash (in a bag) in my 5 gallon pot as well.
I'm thinking I could easily mash 8-10lbs of grain in my pot for a low gravity recipe. The question is, do I sparge until I hit 4.5 gallons or so and then top off at the end of the boil, OR do I collect as much as I can in my main brew kettle, and then collect another 2-3 gallons in a smaller kettle.
(I would actually collect all of the wort in my fermenter first to make sure both pots were the same gravity, and to check my efficiency. Then split the wort between my 2 pots.)
I would continue my boil in the larger pot as usual...hop additions and all, but in the smaller one I would just boil for the 30-60 mins to get rid of DMS. I would then chill both and combine in my fermenter.
Does anyone have any experience, or see a problem with this method? Any and all input is needed, and appreciated.
EDIT - I was thinking of doing a Mild for my first all-grain experience. Low gravity, simple, quick turnaround.