[Vuron00]

You say that you are playing against "medium skilled weak tight" players. I'd say that if you're playing in the $3 MTT's with 4k players, than you are giving most of the players way too much credit.

You've said that you're making it deeper into tournaments, but aren't getting significant cashes or returns. It sounds to me that you are playing a bullying style against bad weak tight players early to build up your stack. Once all these bad weak tight players are gone, you're running into decent players and are having a tough time changing from your bullying style which isn't going to work well against better players. If someone sits at a table with you for any length of time and knows what you are doing, they will try to trap you, as that is how you play against a bullying style.

Yes, your bullying style will work at very low limits very well and even early in higher limit tourneys. But, you have to know when to change your style to adapt when you get deeper.