Here is a fix for the laggy bug on WiFi Models :
https://forum.xda-developers.com/t/rom-unofficial-7-1-2-e-os-by-android-andi-shared.4274001/
VIDEO TUTORIAL BY PUCK DARLINGTON (Channel 48) :
Spoiler Video :
Reggae Song homage to /e/OS and Android-Andi, tutorial and speed fix
NOTE :
There is a problem of the ROM being slow. This issue has been solved in this video above so, do watch it !
SPECIAL THANKS TO :
@Android-Andi for making this tablet live for such a long time. (Android 4.4 to 7.0 and also helped in making 8.0)