VDO Instrument Holder

Intrument holder for 80mm additional instruments, in my case a VDO rev counter. I didn´t want to drill holes in the bodywork, so i designed this instrument holder which is attached with 3 neodym magnets (22mm) https://de.aliexpress.com/item/1005006280048234.html?spm=a2g0o.order_list.order_list_main.11.1c0f5c5fOyi08J&gatewayAdapt=glo2deu