Hi Jay, In other words, we need to develop other module to use a good convert unit on Stable???? If is yes, I'm not agree but no problem, I develop this and override the original fields definition, but I think is not a "Clean!"Solution!!! Nhomar PD: I can make the change on addons and propose for merge if you will pay attention, because I think is a BUG not a WISHLIST. Thanks. 2010/4/26 Jay (Open ERP)