I wanted an M4 version of the spider without captured nuts. I am not a fan of capturing hardware in models unless I really have to.
I created this spider from scratch in Fusion360 (not just a simple mesh adjust) and added M4 metric holes.
The nuts are regular hexagons not square.
I also create the secondary mirror with slotted M4 bolt and sacrificial bolt locator/swivel plate to complement this spider
https://www.printables.com/model/266322-hadley-secondary-mirror-holder-m4-slotted-bolt-rem
Printed in PETG
0.6 nozzle
0.2 layer height
30% infill
3 perimeters
The author remixed this model.