Cylindrical knife sharpener

This knife sharpener uses sharpening stones found on aliexpress:
https://fr.aliexpress.com/item/1005005751348299.html?spm=a2g0o.order_list.order_list_main.65.4ed05e5bZt4W5K&gatewayAdapt=glo2fra

The sharpening stones are maintained by magnets on the structure.
The cylinder inside parts are rotating using 2 ball gears
Two large o-rings are used to surround the top and bottom parts are
Whole structure is maintained by a M6x85 screw and nut.

To make it you need to print 4 parts:
- the top side
- the bottom side
- the body
- the knife support

You will need following parts:
- 14 M3 x 13 screws to hold the magnets (https://fr.aliexpress.com/item/1005004334268362.html?spm=a2g0o.productlist.main.109.6a2f18441wDrRZ&algo_pvid=39d3f0a9-1a89-4104-b52c-ab227817c80c&aem_p4p_detail=2023072301414216854841563108160005288478&algo_exp_id=39d3f0a9-1a89-4104-b52c-ab227817c80c-54&pdp_npi=3%40dis%21EUR%211.11%211.0%21%21%211.21%21%21%40214527c616901017029282954d0786%2112000028797286018%21sea