Here's a few more of a clear undertray minus the bumper
I made the mould out of a block of wood and you can see some of the wood pattern in it on the bottom, everyone tells me it doesn't matter because after a run you can't tell the difference with the scratches on it.I guess painting hides it just fine too
X5 Addict and others i've seen have put extra holes in their ones at the front brace post screws to hold it on better, some thin double sided tape on the sides would hold it there alright too probably. ALso they've clamped the back of the undertray down under the brass weight. You wouldn't do this with the plastic skid plate though, best to leave the undertray overlapping that to avoid the skid plate getting ripped off.