I am totally going to start using this, and suggesting it to people who are desperate to use personal gems for development purposes. Thanks for making this. :)
No problem :).
It'd be kind of nice if Bundler provided an API Bundler.relax! or Bundler.allow_unbundled_gems! or something that people can put in .irbrcs; but I've not got around to working out how to phrase it.
A big part of the reason that we haven't done that yet is that I'm terrified of having to try to support people who have horrible interactions between bundled and un-bundled gems. It happened a lot in the days when Bundler wasn't as strict, and it created a huge support load. I basically figure that anyone who can figure out how to write code that does that will be able to look after themselves if it goes bad. :)