I laughed when I saw some folks trying to sell paper strobe discs for $20.
This one is made of 110lb card stock and laminated to last a life time. Covers 2 speeds, 33 1/3 and 45 RPM. They are my design, my math. Works good. All you need is a fluorescent lamp and a darkened room to check or adjust your tables speed.
$13 dollars and I'll pay for shipping. (US only).
Paypal is the only way. PM me if you are interested.
Wayner
