Take it apart first, learning the guts and interactions, and polish everything. Shoot it stock for awhile before spending $$.
Springs will be all you need when you are ready. I run for springs; 11.5 hammer, 9 RSA, extended CZC firing pin with their lightened FP spring, and CGW TRS with their trigger pin. After all the polishing, less than 6lbs DA and 2.3lbs SA. Very nice weapon to shoot!