Wanhao Di3 30mm to 40mm fan adapter

This allows you to mount a 40mm fan onto the stock fan shroud for a quick improvement in cooling.

You need:
- A 40mm Fan with M4 mounting holes
- 2x M4 bolts [length = fan depth + (7 to 15mm)]
- 2x Original M3 fan mounting bolts
- EITHER:
_ 2x M4 nuts (clearance holes might need drilling out)
_ 1x M4 tap and tap handle

Both the nuts and tap can be used, but it's not neccessary

Pictures show how to use the nuts and tapped threads.

Let me know if there's any improvements