Theres a couple of excellent videos from shootingatdawn on youtube if you fancy having a go yourself. I'd watched them several times before taking mine to bits and fettling. Trickiest part was getting back together but do everything in the right order and be patient and it slotted together ok.
http://imgur.com/a/RWTiumX
https://youtu.be/GFAgEQEPTsM
https://youtu.be/JLnRnHbHOf8