You'll leave a lot of sandbaggers behind as you advance up the tiers, by the time you get to tour master most of them are gone. I found I did best in ready go's just before advancing to the next tier, not too big a surprise really I guess. If you feel you are advancing too quickly take a look at your score history and check you are playing all the courses fairly evenly. It's easy to only play the ones you like and can score well on but it will give you an artifically low average and can get you promoted before you're ready. It's the opposite of sandbagging I suppose.
I just had a quick look at your history and you seem to prefer St. Andrews and Kiawah, I don't of course know what the monthly and weekly tourney courses were but I guess you're mostly playing these 2 courses. I know it's horrible to play Oakmont and hit bogie after bogie but it's something you have to do if you want to improve your game a lot.
I'd also advice dropping the hybrid and carrying a 3rd wedge, you'll use it a lot more than the hybrid and a good short game will save you many shots. Have a look in your bag, there might be something you didn't notice at Christmas : )
And wait until you become a legend, -3 won't get you anywhere. I played a 9 hole RG today, birdied the 1st, screwed the 2nd and got a double bogie, par on 3 and birdied the rest for a 5 under. And I got half my money back. To win as a legend you need to have at least 8 or 9 under for 9 holes. It's tough at the top. And I ain't even there yet!