Naw he's got it right.
You remove the screws and plate.
You very carefully remove about 2/3rds of the material on the engine side of the bottom 1/2 of the plate. (like a 15degree chamfer) What that does is to more quickly allow air to flow around the plate at part throttle. And at full throttle it helps to ease the air to flow past that leading edge. It's now trying to flow past a "knife" vs a 1.5mm thick blunt end plate.
When doing this make sure that the gap around the plate -to- bore remains the same! (very important for idle quality)
Now take the loose screws, put thread locking loctite on the screws threads. Install the plate and tighten. Let it dry for a few hours. Then using a dremel tool or a small grinder shave down the threaded part sticking out of the shaft holding the plate and screws.
This is a very "shade tree" way of increasing the TB opening size. IMO it's only going to be worth the effort **if** you spend significant time at WOT.
In my case I go to the track a few times a year. So for me it's worth it. Besides.. as long as you don't slip and nick the bore.. or remove too much from the plate? There is absolutely no down side to this.
He who is enslaved to the compass is free to sail the seas