Install GMail 4.9 on 2013 Nexus 7 with Android 5 "Upgrade" How can I install gmail 4.9 on my Android 5.0 tablet?

I just (ignorantly) upgraded to Android 5.0 on my 2013 Nexus 7. Unfortunately, doing so also upgraded my gmail to version 5.0, which I do NOT want (because the 5.0 layout gives me less information than the 4.9 layout, and there is no way to change it to the more compact and useful screen of 4.9).

I have downloaded to my tablet Gmail 4.9 (1271612) APK Download, but when I try to install it, I only get the message "App not installed". I have disabled gmail (evidently, there is no way to uninstall it), and I "Allow installation of apps from sources other than the Play Store".
There are two ways that I know of. The android package manager won't allow you to install a lower version of the same package. 

Solution 1:
Root your device, install lucky patcher, open toolbox, choose "patch to android", and install the patch that allows the package manager install older versions of the same app

Solution 2:
Using the app ApkEditor, clone the 4.9 apk so that it creates a duplicate app that can be installed in parallel with the default Gmail app. This duplicate app also can't be updated from the Google play store.

If you want, I can provide you with a modified apk to install in parallel, though remember, you shouldn't be trusting a stranger on the Internet. Just comment below.