New player with raft weight questions. [PS4]

Can anyone shed some light on the raft bases for me? I've read in multiple places that raft materials don't matter, only the size/design. However, on my simple raft, I have a 1x3 with barrels on the left, boeys in the middle and wood on the right. I have a hell of a time turning left but my right turns are smoking fast. So what I'm guessing is that the wood section on the right is much lighter than my barrel on the left? And if so where is any of the weight information?