I used the search function but couldn't really seem to find definitive answers to two questions that I have, so here goes:

1) What size tub is best for a full grown adult BP? I see that most people seem to max out at 41 quarts, is this sufficient?

2) This is probably a touchy one, but do you guys prefer belly or back heat better? I know that belly aids in digestion but I have also seen that people really like back heat a lot.

Thanks in advance!