Taller printer foot than the stock ones to increase clearance for e.g. noctua PSU fan mod. Stock feet are 19mm tall, this is increased to 33mm. I used a flared bottom for a little better stability. The stock M4 nut can be used to mount this foot as well. 

I printed it in Rosa-Flex TPU 85A, print upside down.

• 0.4mm nozzle
• 0.2mm layer height, 0.3mm first layer
• 240C print temp, 245C first layer
• 35mm/s print speed, 20mm/s first layer

It has a nice squish to it, while still retaining some vertical firmness, print with 15% infill and 5 walls and top/bottom layers. Takes about 3 hours to print four feet.