i too got the 133 when i was 75 and am now 80(and that much more ripped

),
133 is good. i personally would not go any smaller, infact i was thinking my next would be a tempo about 138 or something.
i can get out and stay upwind or hold ground from about 14kts. have had it out in over 35kts and in waves to about head high, it feels a bit too small and skiddy when the waves get around that size, but then again i am still learning to ride waves with a kite