# Battle Of The Modern Responsives. (Calling All 0a/ modern responsive Players)

**URL:** https://forums.yoyoexpert.com/t/battle-of-the-modern-responsives-calling-all-0a-modern-responsive-players/316022
**Category:** Looking for Help/Recommendation
**Created:** [February 28, 2020, 8:08pm UTC](https://forums.yoyoexpert.com/t/battle-of-the-modern-responsives-calling-all-0a-modern-responsive-players/316022 "2020-02-28T20:08:49Z")
**Posts on this page:** 1
**Showing post:** 52

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### Author: ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)
#### Post date: [July 29, 2021, 4:09pm UTC](https://forums.yoyoexpert.com/t/battle-of-the-modern-responsives-calling-all-0a-modern-responsive-players/316022/52 "2021-07-29T16:09:06Z")

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> [@MK1 Yoyos X Spinworthy RBC Coming Soon!](https://forums.yoyoexpert.com/t/mk1-yoyos-x-spinworthy-rbc-coming-soon/341741):
>
> I’m excited to announce an upcoming collaborative effort between MK1 Yoyos and Spinworthy: the RBC (Red Blood Cell). The idea was to take one my wooden models called the Bloodcell and turn it into a metal responsive yoyo. Rather than using an A sized bearing, we decided to use a smaller MR85 bearing that is only 8mm in diameter, the same as the wooden axle in the original wooden Bloodc…

A new metal 0a yoyo that I’m working on with Glen.

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