I just wanted to conflirm that those adapters do work.  
 
I have a 4 drive setup that uses 2 of the adapters to convert a 3 1/2 and a Gotek drive
 
 
Gotek Hard Drive setup on a CoCo3 https://imgur.com/a/VzbdweR
 
 
 
 
>  
>  Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>