Rails - Sep 2011 - hooking into `to_prepare` in a Railtie *after* the files have been reloaded (in dev)

I''m working on a gem <https://github.com/bradrobertson/apartment>
that sets
properties on ActiveRecord models (such as table_name) dynamically based on 
a user config option.

I have an initializer that achieves this. My problem however is that in dev 
mode, these classes are reloaded, so they don''t maintain these values
set.

So I thought I''d use a railtie to hook into the point where these files
are
reloaded and run my config again on the models. My problem however is that 
config.to_prepare in the railtie appears to run before the reload! actually 
takes place. I can prove this with a bit of logging:

module MyMod
  class Railtie < Rails::Railtie

    config.to_prepare do
      Rails.logger.debug("Contact object_id: #{Contact.object_id}")
    end
  end
end

if I load up my console, I get the first log:

Contact object_id: 2202692040

If I check Contact.object_id it matches up:

Contact.object_id  #=> 2202692040

Then I reload!

reload!

Rails logger from my to_prepare logs:

Contact object_id: 2202692040

So it still has the old object_id, but when I check it in the console:

Contact.object_id  #=> 2197355080

Which is the newly loaded class object id.

So how do I get to_prepare to run *after* the files are reloaded? Using Rails 
3.0.10

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