how do you install decoder?

this is my first posting about DCC decoder and now I'm planning to install decoder on C57 steam locomotive from Rokuhan(available in February or March?)

But, it seems no enough space to install on it...

so, I would like to know if you have plan to install decoder on C57, how do you handle it or, do you have better idea or, do you have this kind of experience the how did you succeed?

here is a brief info about C57 www.rokuhan.com/english/news/2016/12/2017.html

any idea, opinion, and experience are okay and it would be appreciated and helpful for having more knowledge of installing DCC system on steam locomotive type train!

It is a bit early to say whether it is a go or no depending on the decoder. A note Digitrax have a smell decoder DZ136T the smallest from Digitrax. TCS Z2 might also be possible , looking at picture it might be possible to lift the coals load and create space with a oil tank top, but until I get my hands on one to open it it is speculation at this point

regardz Garth