[Launch Mini]

Okay, got a starting point
There are 3 screws you will need to remove. One on each lug, and one for the buckle.
I usually work on one at a time.
First, work over top of something like a towel, incase you drop a piece, it doesn't bounce across the floor
If you are a bit unsure of your screwdriver skills, you can put a piece of scotch tape over the first screw in the lug.
Us the tip of the screwdriver & gently undo the first screw. It will unscrew around a 1/4 of an inch. YOu will feel it slip at this point. Just use your fingers to pull the screw out.
Inside the end of the strap, you will see a metal "tube". this is a reinforcement for the strap.
Take your screwdriver, and using the flat edge of the bit, gently push on the tube, it should slide out the other side. Pull it out & re insert into the new strap. ( unless the strap is a new rubber one. You will see it already contains a built in tube)
Place the new strap between the lugs & line up the holes. Slide the screw in ( threads first) and wiggle it around, until you feel the screws slip into the lug hole on the other side.
Take your screwdriver, and FIRST, turn counterclockwise, until you feel a slight "Click", then screw it in all the way. Give it a good "snug" twist, but not too much.
Then just repeat for the other side.
On the buckle, when you remove the screw, the tang will come out also. So on reattachment, put the screw it to the tang hole, slip the tang in & slide the screw the rest of the way.
Again, counterclockwise first, then tighten
This is also a good time to remove one of the extra keepers, if you like only one.
Good luck, take your time & have fun