Hi Phoenix
We bought a Nemesis for our new van last year. I think you have to be a bit like Swartznegger to wrestle with it plus I've never got it to fit on the new Baileys alloys that well. Also if you take it for on site security it's a bit of a handful. We ended up buying an Alko wheel-lock, a bit pricey but a lot easier to fit than I thought (in fact it's a easy peasey when you get used to it) and an absolute doddle to transport.
We now leave the Nemesis at home and fit it when the van is stored, looks very impressive, probably give any thief a hernia trying to lift it.
Hope this is of help
Best regards Tomo