"BitCoin-QT" Core Upgrade - PRIOR Steps? I plan an upgrade of an old "BitCoin-QT" Core client wallet from 'V0.7 2-beta' to the latest Bitcoin Core 0.15 (Oct 2017).

I've got good instruction on the upgrade path - but my questions is: 


Besides backing up my ‘wallet.dat’ (in case something goes wrong in the upgrade) - is there anything ELSE I should consider in this big Upgrade leap ? Thanks
bitcoin-qt 0.8 changed the database structure. Bitcoin Core 0.15 changed the database structure again. There is no direct database structure upgrade path from bitcoin-qt 0.7.x to Bitcoin Core 0.15. You will have to upgrade to a version between 0.8 and 0.14 first before you can upgrade to Bitcoin Core 0.15. I recommend first updating to Bitcoin Core 0.14.2, letting it build the databases and sync, then upgrading to Bitcoin Core 0.15.0.1.

See also: https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-0.15.0.md#how-to-upgrade