Yokomo YZ-2 shock piston issues

[Andrius]

hi folks. My YZ-2 almost assembled. Came across shock assembly. Put shock shafts and pistons together as per manual, and find some movement slop in piston. Seems washer not thick enough or grove in shaft to big. Stock washer is 0.5mm tick obviously too thin, however 0.75mm too thick cant put clip on shaft. Do you guys had same problem or just me bought bad kit? Put front shocks together filled up oil, i can feel the slop in the movement of shaft whilst moving shaft up and down quickly. Might i should get some third party pistons? cheers