Russell,
I did some digging last night and discovered that the reason for the 1.5mm spacers under the front body posts was due to how close to the track the small front spoiler is. This is not an issue with our track but apparently is an issue with plastic tracks where the track can come in contact with the spoiler. We should not have any issues at all with the spoilers and should not have to install any spacers under the front body posts.