its not worth buying a brand new one for £60 mate!
if i were you i'd just ask around on the forum for people that are selling just the lever blade on its own, as i had a lot of trouble with my carbon rb body, and ended up having quite a nasty accident due to a faulty rb spring in the lever body! so id just file down a standard magura body so that the rb lever blade could fit. :mellow:
haven't had any problems so far, had it for about 5months now, works a treat!
i don't think that they are weak in any way, i've hardly ever heard about people snapping their rb!
thats what i would do mate, but its your decision, and if you have £60 to buy a brand new one, then go for it :S
cheers jack :D