A Schwarzbier using coopers can?

Hi ,I'd like to make a schwarzbier using a can of coopers pilsener
I'd like your feed back on this, I'm going for a malty sweeter beer .

1-thomas cooper pilsener
1kg dark dry malt extract
500g extra light dry malt extract
250g carafaII steeped
250g cara aroma steeped
yeast strain 2206 Bavarian lager wyeast
not sure on the hops yet

I have fuggle,sterling,bullion,cluster,crustal and liberty on hand at the moment

let me know if I'm way off the map with this

 

I would leave out the dark dry malt extract and use some dehusked carafa for the dark color without the roasty flavors.

Liberty with just a bit of sterling blended would be tasty.

Here is a good article on byo
http://byo.com/hops/item/1351-schwarzbier-style-profile