R/C micro Shock 40mm solution

these are my solution for the Tamiya 40mm Micro shock i have a design to make them and i think it might be possible to make them work but the design requires pen springs i have no click pens to steel the springs out of so i have a bunch ordered from China but this spring works just as well and has the exact strength as my Tamiya Semi the thing is sitting about 10mm high but i expect this to drop when i get the body and battery and electronics made and mounted

so the Tamiya Semi is getting rea