Shock absorber

Newer and improved slim version is out: https://makerworld.com/en/models/1909728-rc-shock-absorber-8c#profileId-2047748 I needed a custom shock absorber for my RC car, so I made one.For the 20 mm part you will need a 35-40 mm compression spring and for the 30 mm part a 45-50 mm compression spring with a 0,8 mm wire diameter.The guiding rod is a hex socket cylinder head screw M3 https://www.ebay.de/itm/162035060113?var=461004073200I recommend that you use an M3 insert, a 35mm screw for the 20mm c