To those who use Fused beads for XRF Analysis

I am currently looking at instrumentation for FB preparation and trying to get a feel for what is the best machine for the task. We currently run Raw meal and Kiln Feed by fusion and the others samples by PP.  I have looked at the PANalytical Eagon 2, Herzog HAG-m- HF, Claisse M4 and Fluxana Vulcan

Has anyone any experience with these instruments.  I am looking at

1) Cost

2) HF vs Flame pros and cons

3) Reliability

4) Its level of use within the Cement Industry.

5) Any other observations by users.

Many thanks

Leo