# Tom Kuhn Heirloom Box of six yo-yo history

**URL:** <https://forums.yoyoexpert.com/t/tom-kuhn-heirloom-box-of-six-yo-yo-history/297724>\
**Category:** General Yo-Yo\
**Created:** [January 20, 2019, 9:15am UTC](https://forums.yoyoexpert.com/t/tom-kuhn-heirloom-box-of-six-yo-yo-history/297724 "2019-01-20T09:15:02Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![YOHANS](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yohans/32/40176_2.png) [@YOHANS](https://forums.yoyoexpert.com/u/YOHANS)\
**Post date:** [January 25, 2019, 2:52am UTC](https://forums.yoyoexpert.com/t/tom-kuhn-heirloom-box-of-six-yo-yo-history/297724/13 "2019-01-25T02:52:44Z")

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@codinghorror

1. the proyo2 is not a wooden transaxle. Think of it more like a tiny one-piece Flores yoyo hugged in perfectly formed plastic bodies to make it feel modern. Those high wooden walls kept the halves parallel and helped with response. The curved axle area helped solve the fragility of the proyo1 wooden axle but hugged the string too much and caused more friction and less spin than the proyo1.

1. the proyo “1” has a brass “hex axle” to solve the problem of rotating halves (the endless pursuit of early 20th century yoyo engineers, actually the subject of the very first U.S. yoyo patent).

Your proyo “1” is riveted or does it have the knurl fastener?

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