GIgabot Upgrades & Fixes

So Here are the upgrades and fixes I would like to see happen to the Hive. Some of them have their own thread.

Better control board (Duet Wifi 2 This has its own thread I find this more of a fix than an upgrade with the age of our current board and the troubles it has been causing.)
A Z axis sensor that works with the glass plate we already have (i have put this up for a vote, as it will create an immediate upgrade to the Gigabot. It has its own thread)
Gantry Fixes The gantry has been hit too many times and needs to be fixed.