I can show you how to change furniture drawer pulls where the center-to-center measurement of the old hardware differs from the new hardware.
HOW TO CHANGE FURNITURE DRAWER PULLS
STEP 1. SELECT THE NEW FURNITURE KNOBS.
The major problem you run into when replacing hardware is finding some with the correct screw hole width to fit what’s there.
STEP 2. FILL SCREW HOLES WITH WOOD PUTTY.
As I just mentioned, use one of the original holes so you don’t have to fill two holes and drill two new holes for each pull. You need to decide which hole to fill.
STEP 3. SAND WOOD FILLER.
When the wood filler is dry, it's time to sand off the excess. I use 100-grit sandpaper by hand to do the sanding. Sand the filler flush with the drawer front. When you are finished sanding, there may be a little depression where the filler shrunk as it dried.
STEP 4. DRILL NEW HARDWARE HOLES.
The next step is to drill the new screw holes. You can lay the hardware pull on the drawer and mark with a pencil or pen where the new hole should be, or there is a handy dandy cabinet hardware template that makes this job much easier.
STEP 5. ADD THE NEW FURNITURE HARDWARE.
This is where I inserted the replacement hardware so you could see how well it fit. Another thing to mention is it’s always nice if the replacement hardware covers the original holes.