just for kicks, i bought a spare for ~$30, and bought a box of sanding rolls and a few dremel bits like a tungsten carbide and went to town on the tb. i didnt touch the area near the plate for various reasons.
i also cut the top half of the tb shaft and cut the 2 bolts holding the plate and used red locktite to prevent the bolts from coming loose again(funny/scary story). took a few hours over the span of a few days but i leanred a few things from it.
PICS-quite a few....
Running a separate MAF with a ported TB seems like a good idea, since the stock MAF needs the hump to read the airflow correctly. At least this is what I hear one of their engineers have stated.