I am thinking of racking a second time from a carboy into the original 6 gallon pail. ( i don''t have enough carboys to rack). Then once it is in the pail - immediately pour it back into the carboy with a large mouth funnel. I am not sure how the O2 will effect the wine going back into the carboy using the funnel. Any concerns with this process? Actually when I rack from carboy to the 6 gallon pail I intend to add bentonite as well.