I have a Blizzard PPC/040 accelerator in my Amiga. The 040 gets REALLY HOT(!) when in use and so I added some active cooling to it. That helps it stay cool(er) however it means the heatsink now sticks out the bottom of the Amiga's case.

In order for the fan to be able to breath, and to keep the machine level, I made these riser feet. They are designed to go over the existing rubber feet - which are needed to help lock the riser into place. The risers are designed to be attached using only the case screws on the far left and right of the case. A small spacer needs to be printed for each and the existing screw needs to be replaced with a longer version to re-attach the case.

So far it is working okay, with the 040 going from being so hot it would burn you, to being just 'slightly to warm to touch for long' (I guess around 40-50C).

Quick side note - I have seen some people selling this design on eBay. I am happy that people find this design something worth selling!! Please be advised of the license that this is released by: Creative Commons - Attribution. Simply put, this means you can sell and redesign this with no obligation to get permission from me. However "You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use." (quote from https://creativecommons.org/licenses/by/3.0/)

So feel free to sell the designs, just provide proper credit to the designer!

(PS I am NOT selling these myself, if you see one for sale it has NOTHING to do with me!!)