Landships II

Companeros,
Im fairly new, in terms of posts, to the board and WWI armor. A few years ago I began a project to build a R/C 1/6 scale MARK IV. Before taking on this challenge, i decided to build a cardboard mock-up. While not perfect, it served as a great picture prop. Years have passsed and im now ready to begin this build. 
I was never happy with the shape ( I used the Emhar as a model) and sponsons. 
A friend has recently sent me digital file with a 1/35 scale diagram that reflects the shape a little better and I plan to blow this plan up to 1/6 scale.
What would be the best way to calculate taking the 1/35 scale diagram and blow it up to print at 1/6 scale? 
Ive also included some pics of my cardboard build. Please give me your opinions in terms of size, shape, width, etc...

thanks again

https://i149.photobucket.com/albums/s74/siquisiri/WWI/3ad156fc4d141c573389039dd502ff6e5b3e292.jpg

https://i149.photobucket.com/albums/s74/siquisiri/WWI/c0315bf84219185f25fcad76f0687890a4801f4.jpg

https://i149.photobucket.com/albums/s74/siquisiri/WWI/normal_c10.jpg

https://i149.photobucket.com/albums/s74/siquisiri/WWI/normal_c2.jpg

https://i149.photobucket.com/albums/s74/siquisiri/WWI/normal_c5.jpg