[lxde] Change default tty after boot on 16.04

Hello,
I have installed 16.04 64 bit desktop edition successfully on several machines. I installed lxde, lxdm and lxsession and am able to use the lxde desktop environment.
My issue is this:
After installing lxde, when I boot any of the machines, it opens on tty1. I can easily use Ctrl + Alt + F7 to get to the desktop environment, but I would like to change the default tty to 7 so this is not necessary.
I have tried editing /etc/grub.d/10_linux and changing the vt_handoff value to "7" but this had no effect.
Thank you for any advice you can offer.