Two ratchet blocks make it a bit easier, but is your crew having difficulties in trimming the spinnaker, or holding it once it is trimmed?

As you know, spinnaker work is pretty constant (easing and trimming) and has to be coordinated with course changes by the helm.

I have found that in certain cases where we are pointing too high in order to fly the hull downwind, it is very difficult to trim the spinnaker (most likely because it's already as flat as it can be). If you are aware of your sailing angle when the crew is complaining, it may indeed be pretty high.

Either that, or your crew is like me and complains too much!