Hi and welcome to the forum
If the Leader has never been registered then you will be clobbered for the IVA test (updated SVA test), you won't be able to register it on a Sierra V5.
Have a look at the 'SVA Knowledgebase' section over to the left which will give you an idea what is required to pass. I think the Leader will do alright, not so many radius problems to worry about being an enclosed body.
There are a few updates for IVA but I havn't got round to updating that section yet.
Cheers, John