4566 Grip change out / Need Help
Take care not to unintentionally snag and exert pressure on the small angled plate against which the slide stop lever plunger rests. This is the forward part of the sideplate just at the top/front of the left side part of the grip. Tweaking the sideplate can create the potential for damage to the sideplate's legs (which snap around the head of the left end of the sear pin) and can cause functioning problems related to slide stop lever functioning.
I used the same Hogue grips on a couple of very early production ('89/90 vintage - square trigger guard & narrow barrel tab/slide breech face) 6906's which fit the 4013TSW. (I also used them on both issued and personally-owned 4013TSW's, as well.)
I discovered that an issue with the wrap-around style Hogue grips is making sure the hard plastic hooks on the rear of the grips properly seat in the frame under the mainspring. Sometimes I had to slightly adjust the clearance of the hooks to properly seat one or both of them over the frame's inset to either side of the spring.
Naturally, properly seating the hook on one side of the wrap-around grips and then having to constantly exert tension to stretch and seat the other side, while not being able to see in the frame because one end was already seated, made for a bit of difficulty at times.