I don't know about the Sako 75 and 85, but the earlier models seem to all have various brands of recoil pads glued to a black spacer plate which was first screwed onto the wood butt stock. So you have to take an extendable razor knife, like a wallpaper knife or something similar, and saw/shave through the glue in order to peel off the old pad. Then you can
leave the spacer or remove it,
match up a Limbsaver or Decelerator pad,
mark the holes through through those pads onto the spacer,
drill pilot holes into the butt wood,
fit up the pads and mark them for any slight grinding,
grind them ( you really need a jig for this, or a lot of practice ),
fit them back on and tighten them up.
I just replaced the pad on my L61R .375 H&H with the same red rubber as the original, so I will take a photo and post this weekend.
You really need to figure where you want to mount the pad, and measure the stock at the wood or spacer very carefully, before buying the closest pad size.
Let me add ... go look at some videos by Midway and others on how to use a recoil pad fixture, even if you don't think you need one. They show all the other steps I wrote above. I have done these by hand, but am about ready to buy a Miles Gilbert / Wheeler pad fixture tool.
