You may also want to take a look at tools/bitdiff.py which i created to help you "diff" two radio images, to attempt to make the process of
1. download an image
2. change one setting
3. redownload image
4. compare images for what changed

a tad bit easier (hopefully)...

-Jens


From: Marco IZ3GME <iz3gme.marco@gmail.com>
To: chirp_devel@intrepid.danplanet.com
Sent: Tuesday, February 4, 2014 1:29 PM
Subject: Re: [chirp_devel] General inquiry on adding "settings"

Welcome Dan!

> The developer tool that will really help you here is the Browser tab
> (on the left). It breaks the MEM_FORMAT into a tree you can browse, so
> you can confirm Chirp is parsing your struct correctly and the bit
> ordering is correct. Thanks to Dan for this very useful tool.
>

I agree, the browser tab is you friend ;)
Let me add that you can make changes and try them with out the need of a
full development environment using File - Load module which load a py
radio module at runtime.

>> My only request now is that if someone is already working on
>> adding FT-60 settings, stop me now so I don't waste my time.
>
> Starting a feature request, assigning it to yourself, and setting "In
> Progress" would prevent anyone else from unknowingly working on this
> task.

I had my ft60 back after long time, here I am if you need a some help or
perhaps a beta tester.

73 de IZ3GME Marco