[Shooter 2.5]

I have yet to figure out why anyone would have to pin the grip safety. If you take the safety out of the pistol, all you have to do is break off the tap which stops the trigger. Without the tab, the trigger can't be blocked.

Unless, you don't like the movement when the grip safety toggles up and down.

Most people don't shoot the 1911 with the high hold, thumb on the thumb safety. Unfortunately, when the high hold is used, the palm of the hand "cups" the grip safety and the safety isn't pressed down. The solution is going back to the original flat mainspring housing.

[The KG9 Kid]

I have a steel mainspring housing on mine, like you said. It came off a vintage blued 1911, but was Parkerized before I bought it out of an orphaned parts bin at a show.

The Thumb Safety is a modified smoothed aftermarket version that sits flush with the frame.