Pokey,
Why would you trade out a hydraulic system for a cascading, double ended system? Does the hydraulic need to be rebuilt? That might be simpler and cheaper than changing. I think of the hydraulic as the gold standard.
I want to add a hydraulic, but it will probably wait until I redo my standing rigging.
Hey Keith,
Yes, the hydraulic unit needs to be rebuilt ($330 at Sea Tec).
Switching to a cascade will cost about the same or a little more, including a new spectra backstay.
A cascading system is far better for a boat in the 30 foot range, in my opinion. Here's why:
1. Blocks are much lighter.
2. Blocks don't need to be rebuilt every 10 years.
3. The cascade system works better for making small adjustments to sail shape in puffs and lulls.
4. A cascade (block and tackle) system is easy to route so that adjustments can be made while by the helm or main-trimmer stays on-station. This is important for three sub-reasons:
a. The helmsmen or trimmer can adjust the backstay while concentrating on their primary tasks.
b. Keeps weight out of the ass-end of the boat, allowing the boat to sail 'on her lines'.
c. Keeps weight closer to the boat's fulcrum (fore-aft center) and thereby minimizes see-sawing.
5. You can also make a cascade system double-ended so that adjustments can be made from either rail (invaluable while sailing upwind in a breeze).
6. Blocks are also probably more reliable.
Just my opinion. Others will probably disagree.