(adsbygoogle = window.adsbygoogle || []).push({}); Is it safe to go from 3.55 cfw to ofw 3.56? ive herd you loose being able to update usb?

Yes, you would lose the update via USB option. All you have to do is get the official firmware and follow the same steps you did when you used the custom firmware. Then after you're done, you are safe to update! =)