Yes, I already see I missed something.
That fan surround will have 4 holes in it, use the same holes to fix the 
plastic cover on top of the lid when screwing the fan to the underside of the 
lid.
N.

Date: Sun, 19 Jan 2014 23:02:25 -0500
From: [email protected]
To: [email protected]
Subject: Re: CS>Where to buy generator(to Neville)


  
    
  
  
    This would be way easy to build if I had an idea of what you are
    proposing. Not enough explanation, like where to put the parts. What
    is a stir bar? I know it stirs, but how?

    A drawing would be very nice!

    

    Joe

    On 19/01/2014 5:57 PM, Neville wrote:

    
    
      
      A bubbler is not the way I would go either.  If you
        know someone who is handy with their hands and a soldering iron
        you can make your own magnetic stirrer, all you need is….
        

        
        1. Fan from an old computer
        2. Magnet from hard drive of same computer
        3. Adaptor converting mains AC power to 12v DC.  A variable
          converter is ideal and set on lowest setting that keeps stir
          bar spinning e.g. 4.5v
        4. A jewellery box, they also have a draw for storing stir
          bar/s
        5. A hole saw the same diameter as the fan to cut hole in
          the lid of the jewellery box 
        6. A square or round piece
            of plastic speaker cover cut from an old radio or something
            similar for sitting brew vessel on when affixed to the lid
            over that hole
        7. A stir bar
        

          8. An on/off switch fixed to the box and wired in the circuit
          is optional
        

          Wire all the above together and you've got a magnetic stirrer
          that works perfectly.
        

        
        N.

          
            Date: Sun, 19 Jan 2014 11:43:26 -0800

            From: [email protected]

            Subject: Re: CS>Where to buy generator

            To: [email protected]

            

            
              Trem...do you use any kind of stirring device?
              thanks,
              Deb
               

                

                
                  
                      On
                        Sunday, January 19, 2014 2:21 PM, TREM
                        <[email protected]> wrote:

                       
                    
                      
                        
                        
                          
                            Avoid bubblers. 
                                Bad practice to use one.  It introduces
                                nitrogen and dust.
                              
                            Trem
                              
                              
                            
                              
                                
                                  From: Deborah
                                      Gerard
                                      [mailto:[email protected]] 
                                      Sent: Sunday, January 19,
                                      2014 11:07 AM
                                      To: [email protected]
                                      Subject: CS>Where to buy
                                      generator
                                
                              
                                
                              
                                
                                  Can
                                      the group advise where to buy a
                                      generator with a built in bubbler.
                                      I found one for over $200.00
                                      thought that was too steep. Got a
                                      friend in the west coast really
                                      wanting to make her own...I trust
                                      your opinions here and want her to
                                      get a good deal on something that
                                      is easy to use.
                                
                                
                                    
                                
                                
                                  Thanks
                                      in advance,
                                
                                
                                    
                                
                                
                                  Debbie