Update from 4.1 to 4.2 on fez spider with IFU (with or without Gadgeteer)

At the end of next week we have almost 150 Fez spiders with 4.1 on it out in the field. In the future I maybe need to update to 4.2. Could this be done thru IFU?

Possible but no guarantee yet. This is easy between updated but moving from one major release to another is not always guarantee, but we try to make it happen.

So for now the best thing to do is a manual update, am I right?

Yes. Note that IFU is not in 4.2 yet.