[Q] Flash from ICS to GB-Safe?

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http://forum.xda-developers.com – Hi I want to try out ICS on my HTC Desire. If it ends up being unstable im going to want to flash it back to CM7 (gingerbread), but is it safe to do so. Are there any extra steps i need to do other than wipe the cache partition and wipe data/factory reset, then install zip from sd card. (HowTos)