With the racks from RBI, are the flexwatts attached to the racks, or are they given like how they are when you order them individually and attach them to the tub? That's what I'm also confused about as well.

And... Would they eventually be in 41qt sized tubs because I remmber reading during my research that putting bps in a 41 qt was only preference. I may be wrong. I'm just asking to see if I should buy a 41qt sized rack. Thanks guys!