I too have just discovered the awesomeness of tri tip. It is hard to come by around here. Yours doesn't look bad at all! Keep it up, and you'll soon have that tri tip nailed down. It makes a great piece of beef to cook when company comes over.
Matt - 18.5" WSM; UDS; DigiQ DX2; Commercial Series Gasser; Maverick; Some Other Crap, Too!