I have the same CFC100 I've never had trouble with it yet and its earned its keep so far.
Our old one was more of a ridged frame with 3ton lift but it was a pain to store and not easy to move around like the new one is.
I took a 200tdi out of a Discovery with no issues. Also used it to pick up the full back end of my MR2 as it can lift it square from both towing eyes and generally get it alot higher than the jacks can.
aaronmorris, thats good bit of kit you got there but why did you need to lift it that high?