500 ton masters, STCW basic, VPDSD, RFPNW

I would like to obtain my 500 ton masters. Currently I hold 100 ton near coastal, AB unlimited, PSC Lifeboatman, STCW basic, VPDSD, advanced fire fighting, RFPNW and plan to take Radar, Leadership and managerial skills and ECDIS. What other requirements do I need other then testing do I need to get my 500 ton?