Many times I have had a shop change my oil during the week when I was away from home to save some time at home.
2 or 3 times the shop said my XFire was done and I looked on the shop floor and the belly pan was still there.

And they kept losing the bolts,
I ended up just using #10 pan head screws with flat washers, I believe that was the size, never lost one and fits good and a Phillips screw driver to take off.