Dopamine is the signature yoyo of Ross Levine. He's been posting to Instagram under the usernames ilinx_toys and modern_yoyos for over a decade and in that time has received praise from some of the top names in yoyoing and flow arts. Ross' style aims to epitomize flow, often forgoing string hits entirely and using slack almost like a second prop, independent from the yoyo.  Early in the development of his style, Ross learned of a yoyo called Freq. Wav by the now defunct (but always legendary)...