I found it a real pain to cut the chassis protective sheet to the right shape and size once the kit was complete. I recommend the following alteration to the build sequence:

1. Proceed per the manual to the left-hand part of "Front End Build - Step 1". Install the front bulkhead.

2. Skip ahead to "Rear End Build - Step 1" and install the rear chassis plate.

3. Place the chassis on the chassis protective sheet. Orient it on the sheet so that one side of the chassis lines up with a long edge, and the end of the rear chassis plate is even with one end. (Part of the front bulkhead will overhang the other end of the protective sheet, and this is OK because its underside will be protected by the front bumper.)

4. Mark the protective sheet around the edges of the chassis/front bulkhead/rear chassis plate assembly.

5. Put the protective sheet aside, and resume the build at "Front End Build - Step 1" by installing the front transmission.

6. Enjoy the ease with which you apply the chassis protective sheet at the end of the build.