Stylus gauge recommendations ?

When I ordered a new cartridge from Gene Rubin Audio (a Hana ML), Gene also sold me a very simple, very modestly priced Ortofon stylus force gauge. It operates like a simple lever. It worked just fine.

Try this works great

Use any of them but don't think a $20 gauge is repeatedly accurate to three decimal points. Good news is one decimal point plus your ears should be fine. ( same can be said for spirit levels - ever priced a calibrated Starret :) )

+1 on the Riverstone

I forgot to mention, because it should go without saying maybe, that you do have to be careful that the weigh pan is nonferrous (i.e., will not be attracted to the magnet in any cartridge), and must gauge the force at approximately the level of the surface of an LP mounted on the platter surface. So the weigh pan should be above the platter surface by about the thickness of an LP.  Surprisingly, some of the cheap ones appear to use stainless steel with a low level iron content. Seems the Riverstone is OK on that score.