Drop in fit for girsan untouchable - Fusion Firearms 1911 Mag-well Mainspring Housing

Purchased to rplace factory main spring housing on my EAA/GIRSAN 9mm 1911 Untouchable. Due to the nature of the Untouchable's mag-well mounting, I had to remove it to replace the grips. The Fusion Firearms housing with mag-well replaced that. It fit right in. I did replace the spring and internal housing pieces, so I don't know if the Girsan parts worked inside.