One thing I would add.... I use the CPE2+ for 35 MM and 4X5 negatives. It is a God send. BUT, the problem I have is the water that comes from the tap is hardly ever below 72-F and usually about 74-F. This presents a problem in bringing the temperature down, not up. Perhaps the CPA or other models can chill the water as well as heat it
I think there will be no difference between the CPE2 and the CPA. But that won't be a problem here, because I can get the water almost frosty from the tap. The problem is that it sometimes may take forever to get warmer water. And to hold the temerature at a level is difficult sometimes of course.
Never stop until your good becomes better, and your better becomes the best. -- Frank Zappa
Short answer yes...
The longer one, yes it god for that just take som 10-15% of the time if there are no rotations times available.
The other reason is that you use only the half chemistry at rotaion ..
so go for it and good luck