You do that

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I have another project here on oople where I made myself a 2wd mid ultima and it works great. I made the chassis like this. Took a 8 mm MDF and drew up the layout on that. Simply copied the holes on to that by putting the original chassis on top and drilled. All holes exactly were I wanted them. Then I put that mould on the cf and did it all over again. Perfect result. Applied the same principal when I made the topdeck but this time i did not use a mdf. Just strapped the original tight to the CF.
The chassis for the Lazer is not necessary but it looks cool and I am going to use either the Azarashi Tateego or Womoog shell so I have an undertray to protect the inside and bottom. Just love those Azarashis