Cheers for yet more suggestions guys

Mikey - funny that, Rab suggested i do the same to my standard rear beam, im sure it'll be adequate enough for you and just as strong if not stronger than the ZS beam if you've boxed the underneath of the beam off.

Ken - No one has suggested the Puma beam before. Good shout! Will get in touch with Pumabuild and see if there is a difference between the Puma and ZS items.