I am very happy with this solution to moving the chain ring outward (rather than the motor itself).
Often the chain stay makes contact with the chain ring with a standard BBSHD install.
You can use bottom bracket spacers to move the entire motor or you can use these spacers.
You will need longer 5mm bolts for the chain ring using these; I wish Luna included them or at least had them listed for sale with the spacers.
I used 2 spacers for my installation and was able to use some 25mm length bolts with washers for the task; I would recommend 22mm for two spacers as the perfect fit without washers.
Make sure you use stainless steel bolts here.