Anet A8 Dial Indicator Back Support Adjustable

### Warning:
You need to open M4 threads on the linear bearing blocks to use this part!


### Description
I made this support to use my dial indicator on a practical way on my printer. I want to hold the dial indicator as close as the extruder center, and it's hard to that because the whole extruder structure is a little bulky (fans, extruder motor, etc.) so I decided to fix the dial indicator on the back of the linear bearing blocks.

### Material:
- M4 tap
- 2-4 M4 bolts
- 1 M6 bolt and nut to fix the dial indicator