Build for TP-Link Archer C1200-AC1200

My C1200 v2 (EU) on the latest official firmware is actually running a custom version of OpenWRT 12.09rc1. I managed to enable dropbear and SSH into it and escalated to root to take a look around as I was running into some issues that I wanted to debug. I don't have experience with porting and developing on LEDE/OpenWRT (just as user on my previous routers). Anyone can point me in the right direction to make something out of it?

Thanks.

(x-post to the OpenWRT forum)