Merge pull request #941 from openaps/gregtcm-patch-12

Add notes about optional items

docs/docs/Gear Up/edison.md

@@ -45,6 +45,10 @@ If you're unsure whether you need to cut your Explorer Board's antenna, you prob
 
 ![Image of Antenna](../Images/antenna0.jpg)
 
+Optional: You can also add an external antenna to the explorer board such [as this](http://www.mouser.com/Search/ProductDetail.aspx?R=66089-0930virtualkey65480000virtualkey620-66089-0930) from mouser.com. (Note: specific range improvement length has not been confirmed.)
+
+![Image of Antenna](../Images/antenna1.jpg)
+
 ## Radio stick (only if not using Explorer Board)
 
 We recommend the Explorer Board with a built-in radio (see above), because if you get an Explorer Board, you don't need an additional radio stick or CC-Debugger. 
@@ -81,10 +85,15 @@ There are a few 3D-printed cases that are being designed, so check back here for
 * [Small clear plastic case perfect for larger Sparkfun 2000mah battery: #8483](http://www.ebay.com/itm/272062812611)
 * [Robert Silvers and Eric Burt's case for Explorer and 2500 mAh battery](http://www.thingiverse.com/thing:2282398)
 * [Robert Silvers' case for Explorer and 2000 or 2500 mAh battery](http://www.thingiverse.com/thing:2291125)
+* [Small Plastic Clear Case for 2500 mAh battery](http://www.ebay.com/itm/272062812611) - Since a Tic-Tac box is too small for the 2500 mAh battery.
 
 ### Soft Cases 
 * [TallyGear soft case](http://www.tallygear.com/index.php?route=product/category&path=120) - these are the soft cases Dana uses ([see this example](https://twitter.com/danamlewis/status/792782116140388353)). The OpenAPS-sized case can be made any any pattern/fabric she uses elsewhere on the site.
 
+## Other Options
+
+* [Heat Shrink Tubing](https://www.amazon.com/gp/product/B009IILEVY)  
+
 # Next steps after you get your hardware
 
 Once you've gotten your equipment, you'll want to head to the "[Setting Up Your Intel Edison](http://openaps.readthedocs.io/en/latest/docs/walkthrough/phase-0/setup-edison.html)" page. **Note that this page has setup instructions for all types of computers, and also has the most thorough troubleshooting section**. There is also an Edison setup page for Mac specifically ([see the Mac-Edison page here](http://openaps.readthedocs.io/en/latest/docs/walkthrough/phase-0/edison-explorer-board-Mac.html)) and for PC specifically ([see the PC-Edison page here](http://openaps.readthedocs.io/en/latest/docs/walkthrough/phase-0/windows-edison.html)). Even with the Mac or PC specific pages, you may find the main page with all setup types to have the most thorough troubleshooting section if you run into any trouble.