[bazzargh]

No, you're not. It's not even the best solution in this case. I'd install the rbenv-binstubs plugin:

https://github.com/ianheggie/rbenv-binstubs

And the rbenv-gem-rehash plugin:

https://github.com/sstephenson/rbenv-gem-rehash

... and let them take care of setting the local paths, and you never have to generate binstubs manually either. (YMMV, of course, but this works pretty well)