Measuring Turntable Platter Speed

I use the Clearaudio strobe disc. I think it is somewhat expensive, but you can use either side, one for standard household lights, or the other side with the optional Clearaudio strobe meter, which is definitely expensive. 
 

https://elusivedisc.com/clearaudio-stroboscopic-speed-test-record-strobe-disc-180g-lp/

Digital Speed Readout Turntable Platter Speed Tool - Any Table (turntableneedles.com)

Thanks guys/gals.

audioquest4life - If I read the literature correctly it measures average platter speed which doesn't address the small fluctuation problem I perceive. 

big_greg - Nice suggestion. I might try the platter, but he stroboscope is a quarter of the price of  a new P2. So I don't know. 

I was just trying to confirm what I am hearing is actually true. You never know, faulty hearing, big imagination?

Jim S

The Clearaudio has groove that tracks the cartridge and its drag on the record 

to give you a more accurate reading

A strobe device may miss what you're trying to identify. The other devices mentioned would be even less likely to catch it, in my opinion. Best would be a Phoenix Engineering Roadrunner but that's too costly for this use. Your ears are free.