You may want to port your code forward to take advantage of the latest Sandy engine or port it backward to incorporate newer fixes in an older, more stable version.
Here are some tips on porting code:
If you are porting from Sandy 1.1 to Sandy 2.0, read porting_11_12 and then porting_12_20. There isn't a separate FAQ on porting straight from Sandy 1.1 to Sandy 2.0.
See sourcecode
For details on how to add conditions to your code so it compiles under multiple versions of Sandy, see here.
