GeeeTech A10M Dial Indicator Bed Leveler!

I have been printing a lot with my new GeeeTech A10M dual extruding mixing printer from GearBest (see more here: http://diy3dtech.com/Geeetech_A10M_Mix-color_3D_Printer) and wanted a better what to tram (i.e. level) the bed which would use economical dial indicators such as this one https://www.amazon.com/Triton-Indicator-0-001-Graduation-Travel/dp/B016R3GLB0/ref=as_li_ss_tl?ie=UTF8&qid=1498847936&sr=8-5&keywords=dial+indicator&linkCode=sl1&tag=diy3dtech-20&linkId=5cc081080d1f2430d267deee9ea0b833 for less than $15 bucks or a digital version such as this https://www.amazon.com/Triton-Indicator-0-001-Graduation-Travel/dp/B016R3GLB0/ref=as_li_ss_tl?ie=UTF8&qid=1498847936&sr=8-5&keywords=dial+indicator&linkCode=sl1&tag=diy3dtech-20&linkId=5cc081080d1f2430d267deee9ea0b833 for only $25 bucks. Also you can use a metal 1/4-20 (~6mm) sized nut and bolt combo however I like using nylon nuts/bolts such as these https://www.amazon.com/Triton-Indicator-0-001-Graduation-Travel/dp/B016R3GLB0/ref=as_l