I only used the silver parts of the white decals because the white decal parts are likely to crack and tear due to aging. The tires' polycaps had hardened with age, making attachment impossible, so I sanded the axles and attached them with super glue. Finally, I applied a top coat to protect the decals. There have been no cracks for 2-3 years. I haven't touched the engine. It can no longer be opened and closed, and the cover lifts. The wheels are basically fixed. The kit is attached to the base with screws. I copied the Tyrrell logo and placed it on the back. Thank you.