Rails 3.2 Application - Should I use the version gem (paper_trail or vestal_versions) or process it manually?

My question is: should I run my own version modeling or use one of the versions that already exist? If I have to use a gem, which one is best for this application?

Information about my application

My application is a simple Checklist application. There are checklists and assignments, and I track user responses with answers and materials. The answer tells me what is said in the above (“Done” with the note “We need more mops”), and in the submission I am informed when this particular checklist has been filled (because there can be many submissions and answer sets for this checklist) . I will show my associations below in case this helps.

#checklist.rb
class Checklist < ActiveRecord::Base
  has_many :jobs, :through => :checklists_jobs
  has_many :submissions
end

#job.rb
class Job < ActiveRecord::Base
  has_many :checklists, :through => :checklists_jobs
  has_many :responses
end

#response.rb
class Response < ActiveRecord::Base
  belongs_to :job
  belongs_to :submission
  belongs_to :user
end

#submission.rb
class Submission < ActiveRecord::Base
  belongs_to :user
  belongs_to :checklist
  has_many :responses
end

What am I trying to do with the version

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