I don't thumb flick anymore.
I regularly (but not always) "Spydie-flick" all but backlocks, and I always do it with minimal force to minimize wear.
I NEVER add any wrist motion. Not even for stubborn backlocks.
Own: VG-10 Delica, Old S30V Native, modified Breeden Rescue, VG-10 Delica, HAP40 Endura, ZDP-189 Dragonfly, S110V Manix 2 LW,Pakkawood Delica, Cruwear Para 3, SE H1 Dragonfly, M4 Manix 2, HAP40 Caly 3, smooth G10 S90V Native, K390 Urban, Pakkawood Dragonfly, smooth G10 Cruwear PM2, SE Pacific Salt, HAP40 Jazzlica, Blurple Native, P.I.T.S., DLC Manix 2, REX 45 PM2, REX 45 Para 3, XHP Manix 2 LW, Superblue Caly 3, DLT 20CV PM2, Rhino, SB Calypso Jr., B70P, PMA11, K03, G10 ZDP-189 Stretch 2, Kapara, REX 45 Military, 154CM Manix 2 LW, KW 204p PM2, Swick, Supergold Delica, back lock Lil'Native, AEB-L Urban, HAP40 Stretch, smooth G10 Cruwear Manix 2, Cruwear Military, M390 PM2, Cruwear Delica, CPM 4V Lil'Native, Mantra 2, Cru-Carta Shaman, M390 Para 3 LW, M390 Manix 2, K390 Police 4, RexWood Shaman, DLC Cruwear Shaman.
Waiting for: K490, Swick 5, and something purple.