I ended up widening my tubs on Th. Got them in primer on Friday.
I widened them 3.5 inches. I decide not to 'double' them like the white one just posted and the red one. I didn't want to go as wide as them (I think I ended up about 3" narrower than the white and red one). I will have to re-arrange the wood, but I think it will work out though.
I used this black tub as an example to go by.