Is it possible to recombine values in python?

[ichabod801]

What's the worst case scenario if R-squared is increased? Is the model done with in that case?

The model could be weaker because of too many variables, in the worst case it could be such a weak model it's useless. It may match your test data very well, but it won't match other data as well, lowering it's predictive value and any conclusions drawn from the parameters of the model.