@cheddar  - I may have got this wrong so I will check.

If I load a BG - via what ever means, will the value I have entered e.g. 6.7, remain and be used as the value that I would see if showing in an app such as Blip?

My point is that I am not happy about us converting values that will be recorded as a BG. As I said I would be happy if there is a field that represents  the converted value if that is required for some reason - but the value that I would see should just be the raw value that I entered. 

Also why do all BG's need to be recored in a standard unit value? 

If I load my data and it is shown in an app like blip then is should just be pulling back the data as entered - no conversion required.

Do we want all the values converted so that researches can view large amounts of data in the same base units? If that is the case then if I have opted in feel free at add an --- extra --- field for the converted value to make it easier for the displaying the values in a common base units but I would still want the original value i entered left untouched.

Anyway this defiantly warrants debate.