Grub2 and multiple boot different ubuntu versions

[Tom H]

>> Many thanks to all for the suggestions, I have learned a lot from
>> working through them.  I hope you will all not be upset if I decide to
>> wimp out and just live with what I have, editing /etc/default/grub
>> occasionally as required.  I think possibly the possibility of causing
>> myself grief outweighs the benefit.

> Very good point. Precisely; it's not much of a hassle just editing
> grub.cfg (not even /etc/default/grub and update-grub).

On my non-test box, I also just edit /boot/grub/grub.cfg and keep a
copy in /root so as to have backup after update-grub runs.