Tigsman

If villain has nut flush draw, he likely checkraises the flop. Since he calls, he probably either has a decent flush draw or he's floating out-of-position to try to take this away from you. His check on the turn confirms this since a bet from you as a tight player likely means a made flush, but a check from you likely means he can steal on the river.

If this were me, I think I check the flop behind since; a] it takes away his ability to check-raise, b] it disguises my made hand for future streets. I then pray that a diamond doesn't hit the turn. If it does, as it did, I'm done with the hand if he bets out on the turn, but am likely hoping for a check-down otherwise. If a diamond does not come, then a $32K bet protects against giving him odds to draw to the flush on the river and increases my chances of taking down the pot before showdown.

Being this is first hand at final table, I think I'd open with a raise a little larger than usual, maybe 3.25-3.33 the BB with the intention to fold the table. If I get 3-bet, I'm done with the hand and my relative stack size has changed little. If this was further into the final table, I use the same strategy as above if the table has been tight and I've been somewhat nitty. If the table is loose and/or I have been active then I likely fold pre and look for a more comfortable position/spot.