RC Tank Warfare community hobby forum

Hi I have built a Cromwell (pictures of it on ebay and general discussion forum) I used the chassis from a Heng Long T34 and now I have started another one using the WSN chassis. My question is that the WSN hull is not 1/16 and has to be wider and longer I have corrected this as well as the wheel spacing. Has anyonr else based a convertion on this hull did they find it undersize, I want to go on and make a Crusader III next does the hull have to be modded again to make it 1/16th.
Geoff