RC raven/ fullforce RC are probably the best spring for standard maxx size shocks. I had many springs but stayed with fullforce rc ones till I went to supershocks
Radek
V4 D8 - RX8, XERUN 4168SD
F1-09 - Tekin RS Pro, 17.5t Redline, 2S LiPo
Sakura Zero S - LRP, Saturn 20T, 2S LiPo
*EX-10 Eurus*