Radio Redux - Easy Listening Radio

I am a second year product design student from the University of Dundee. This year, our task was to hack into an existing radio, select a new target market and build a radio accordingly. The character I chose suffered from Rheumatoid arthritis so I knew it had to be something easy to use and something fun to interact with. 

Materials/equipment List:

Sony ICF-S22 portable radio

Single core wire for extending components
Soldering Iron and solder remover
Solder wire
AA battery pack and battery pack connector
Potentiometer to replace existing one

1 metre of wooden dowel
10mm plywood/wood (enough to make circles discussed in step 3)
40mm diameter 210mm long tubing(any plastic tube)
Drill and various drill bits 
Sandpaper
Belt sander 
band saw/saw 
Screws for fastening
Wood glue and a strong multi purpose glue
Wheels for pulley (I used lego wheels)
Any type of thin cord for pulley

Step 1: Exploded view

Here is an exploded view of the final product. I have left out the top piece of wood to show the inside.