Designer parts - Lagless cosmetic parts that will dramatically reduce lag

I would love a selecter similar to the paint, but rather than changing color properties, it tags the part as "Designer" rather than physical. Designer parts are 1 shot by bullets, have terribly inaccurate hitboxes, and have NO physics, or aerodynamic influence. This can be very useful to make super detailed designs that don't lag a bit nor screw up the balance of your plane. And yeah, not lagging with 2K part builds because not all of them are physics parts.