They’re pretty much just machinist’s choice MR85s purchased in bulk, cheaply.
One of the reasons I like designing for this bearing size is that they are abundant and inexpensive. It’s a common size used in hobbyist RC cars.
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OK. Now I don’t feel so bad that I already bricked it 
(Still loving this damn throw, BTW!)
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I never think to try cotton on bearing throws, but after bricking my MR-85 I tossed a Nectar on the Plasm and it’s bliss!
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Thank you for posting this
I ended up using my favorite method to deburr knives and smooth out sharp dings that I learned from another member
Bamboo skewer rubbed along the edges then used to smooth any additional rough spots. I was surprised how long some of the burrs were that I easily removed
Going to play my plasm hard and see if it still cuts strings, I haven’t touched it since I noticed this issue on mine, so fingers crossed 
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It’s been 3ish weeks now and I still find that I reach for my Plasm more than any other yoyo in my collection. The weight, shape and response are just perfect. I wish it could handle just a bit more string at times but I’ve got some 3mm bearings coming to see how that feels. I did get a hold of some 4mm MR85s and it made the throw feel heavy as it unwinds if that makes sense.
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I was thinking a 3mm with some lube would be pretty nice in the Plasm. Maybe even in the RBC.
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My exact thoughts. I’ll let you know in a week or so when the bearings show up.
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The 4mm bearing making it feel heavier on the unwind makes a lot of sense. A 4mm gap with a diameter that large with definietly create that effect.
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