Now here's the thing... I've read up on rear disk conversions for the Astra, which involve changing hubs to 5 stud ones among various other things. Thing is, the 1.6 Zafs already have 5 stud hubs all round... that's right, it has 5 stud drums at the back!
I'm thinking that seeing as it already obviously has 5 stud hubs, has the job just got a bit easier??