oh, awesome...that relates to a question I just posted. It sounds like it's actually not such a difficult task to fully remove the "body"/"deck" (what is it?) and in my case, I need to look into a hacked steering gear anyway, so.....
There's a youtube video that's far too easy to find showing a guy changing a tank on one of these and doing what would appear to be bending the platform in order to barely wrestle the tank out.
I'm guessing a 115 (which is what I have) is not very different in this respect than the subject 118?