help w/ wheelchair track screw removal
Hi all! There are 4 wheelchair support tracks on the floor of my short bus (see photo 1, right side). The 1/4" finely threaded screws are inlaid in the tracks. I've tried leaving WD-40 overnight (twice) using a hex driver and an impact wrench and they're not budging. I haven't used a screw extractor because (1) the hex driver fits (no corrosion or damage to the screw head itself) and (2) the screw is not spinning (aka it's not stripped). I'm assuming the screw ends and bolts I see underneath the bus are the ones I'm trying to remove (see photo 2). Using an angle grinder on the bolts doesn't seem like a good idea since I can't get a good angle to grind/cut efficiently, plus the tool can't reach most of the screws. Can anyone shed some light? Thanks much!