[Closed] Hope RX4 road calipers - anyone using them..

I'm properly fed up with the BR785 Hydro Brakes on my Arkose.
The front one is generally OK, but the rear has never really worked properly. I have now been through 3 sets of pads and 2 discs. I cannot get reliable, quiet power.

I've done all the right things, proper bedding in, cleaning with brake cleaner, etc. I'm now fed up and thinking about a replacement.

Does anyone have experience of these?

[url= http://www.hopetech.com/product/rx4-caliper/ ]Hope RX4[/url]

I can't find a great deal on-line about them, but would be happy to pay £75 per end if it gives me reliable braking.