DIGITAL STYLUS GAUGE

Clearaudio

I use Riverstone. It takes 2 mins to get used to setting it up. Very accurate and reliable.  

I have used this Neoteck for several years, get some spare batteries 

https://www.amazon.com/dp/B01N9TRSPC/ref=dp_iou_view_item?ie=UTF8

these 10mm diameter bubble levels are small enough to fit on your headshell above your stylus

https://www.amazon.com/dp/B07NRG8HX6?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_5

I put a few specks of tack on their bottom edge

https://www.amazon.com/Elmers-Tac-Stik-Reusable-Adhesive/dp/B001CEMCXQ/ref=sr_1_10?sr=8-10

here's a nice mirror same thickness as lp to view azimuth with. any deviation will be reflected in the opposite direction, easy to see/get it right

https://www.amazon.com/dp/B07T31MRZ9?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2

and a magnifying mirror with led light fits nicely below my arm, to see the underside of the cartridge magnified. mine is 4" round, this is two sided rectangle, says brighter light

https://www.amazon.com/GOMIPURU-Magnifying-Adjustable-Brightness-Hangable/dp/B0DKFMC2B3/ref=sxbs_pa_sp_search_thematic_btf_sspa?cv_ct_cx=4%22%2Bdiameter%2Bmagnifying%2Bmirror&s=home-garden&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sr=1-26-4c3ee5d8-c4ea-4c3c-8cf4-b8be2ae560c7-spons&xpid=bKxxnbYkJKdFD&aref=vOlGRlQW0q&sp_csd=d2lkZ2V0TmFtZT1zcF9zZWFyY2hfdGhlbWF0aWNfYnRm

lift it, tilt it, move it around, check the tip, cantilever, and see if any junk is in the recess near the suspension.

Agree with audphile1 Riverstone is quick and easy to use and accurate.  The Neoteck I ordered before that I sent back as the cover wouldn't open 

@elliottbnewcombjr that gauge lied to me by a whole gram. I had distortion due to mistracking and couldn’t figure out why. The gauge was showing 2gr but it waa tracking at slightly less than 1. I got the Riverstone gauge and identified the issue. 
I verified the accuracy of Riverstone later on when I got the VPI table that came with a gauge.