101vape has a GV 521 mini for 25.99 a little smaller at 83 by 61mm.
I've had my CM521 for a while now and with my wonky/shaky hands, it is a must for building!
Storing attys so they aren't rolling around? Problem solved:
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Wally World wood stand for around $5 and drill some holes. Works just fine for me!
Those stands look great, what dept. are they in?