just going to do this job myself thanks for all the coments think im going to remove the inner too know have dry fitted the cill so going for it tomorrow so wish me luck lol
I was going to do this to my Disco before I found terminal rot so have two lenghts of box section of the right size plus new YRM sill to chassis mounting brackets and bolts / mounting rubbers. They will be going on eBay when I get "roundtuit" - unless somebody here is interested