I used to have a CPA2, and when it died I got a CPP2. The CPP2 has an advantage if you change temperatures, but if you always process at the same temperature the CPA2 works fine, once you get it adjusted. I drilled a hole near the well that holds the graduates so I could insert a dial type thermometer into the water bath. It made adjustment a lot easier. The CPP2 dials give fairly accurate and very consistent adjustments, although you should check the temperature with a thermometer when you set the machine up, just to make sure it works right and to know the offset, if any. The only advantage of the CPA over the CPE was size - it could take big drums for big prints. The lift mechanism is always optional. It is a convenience, but the handle is weak and breaks easily. With a broken handle, the lift becomes difficult.
Not the handle with mine (CPA machine), but the mechanism inside - sounds like a stripped gear - handle won't return to position.
Going to rip into it this pm and see what I can find in there.