Any special instructions for _downgrading_ firmware?

I'm considering taking the plunge and manually updating my firmware to 2.7.1.60 (and then on to 2.7.2.102).

In the worst case, I can downgrade back to 2.5.2.4 (and restore my settings from backup).

Unless the update process bricks my HW, in which case I'm under the 1 yr warranty (and even the 3 month phone support, which I'm not counting on for anything useful).

Are there any special instructions or tips for downgrading the firmware? or are the steps the same as in

How-do-I-manually-upgrade-firmware-on-my-Orbi-router-using-orbilogin-com 

Thx.