Football, can you? Sure. But as you have seen, the replies so far have been in line with "why?". I know you want to play with your trainer and add bells and whistles - we all went through that.

Basically a trainer was designed to teach you to fly. Some can be modified for certain things as you know, just be cautious and get tips from someone that has done it. Check with your local club and instructor before you do anything. If you are not skilled in this and are not familiar with the physics you may make mods that negatively affect flight, creating a dangerous environment for anyone and anything around you.

In my opinion, just use the trainer to learn to fly well. Then, get a larger plane to modify, but learn to fly it well first.

Good luck with whatever you choose and keep us informed.