Sprocket failure

So....

New hub and spokes purchased, wheel rebuilt, sprocket and lockring cleaned and white spirited, all fitted together snugly and everything is looking good.

Brake is purchased and I just need to drill out the back of my fork and fit it. It's cost me stupid money and made my cheap >200 quid build into something a bit more damaging to the wallet.

Thanks for the advice, both useful or otherwise.

you fit cog propley this time? cheap used brake - £10, new hub - £20, what the hell did you buy!?