I just got the S-Yard XV 3w with the stock rombax shaft. anybody played with this head with different shafts? thanks

the best shaft for that head is whichever one best fits your swing, find the shaft that'll produce your ideal launch trajectory when matched with your swing characteristics 

i foumd the quadra.fire express to be superb. the diamana b to be incredibly straight. the diamana stinger isnperfect and original diamana  blue  to be  a great all rounder

The Triple X Messenger worked well for me.