I cant see why you would need v4.1 prior to flashing v5. Hboot 1.27 corresponds to your firmware so your good.
Because gb does not support hboot 1.27 bro, he will get bootloops, v4.1 supports both 1.23 and 1.27
V4.1 is endeed the bridge to get v5.0 between hboots
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