Re-Enforce the Twin Jet

Experience with hard landings and crashes taught me the following, which if applied before hand, would have saved the plane, or some of it's components, several times. So here is the customization recommended:

1. Protect your servos: 

On crashes, they may get hurt as well as on regular, speedy landings

2. Re-enforce the bottom and the front side: 

Motors: If for any reason, they drop during the flight, the scotch tape will hold them for the minimum required to avoid a major problem

All the bottom canopy: Because on landings, the wood/foam will get hurt if not protected by some tape

The front side (right and left), next to the cockpit: Because on crashes, the nose, if it hurts the ground the first, will be the first one to break. Some good tape will prevent this from happening on most crashes

3. Re-enforce the structure, which holds the motors

Specifically important for the part below, the structure. here is some carbon fiber, mixed with Cyano, which weights nothing and is virtually indestructible. 

The idea is to diffuse the shock, as much as possible.
If the shock wave is not diffused well, it will just break at the weakest "new" point available so the whole work consists in enlarging well enough the weak parts, with carbon fiber, still linking it with areas, stronger. Some of the shock will be already absorbed, before it will get to the end of the cabon fiber protected area.

4. Don't place, anything, in front of your battery

On crashes, the battery will go very fast, towards the front of the plane, destroying everything on its way. It is highly recommended to have all the electric equipment, located behind the battery. Note the Velcro tape inside the canopy, in order to lock all possible batteries, without any use of anything else. The bigger batteries are put with an angle, and the Velcro locks them at their bottom and their up side.

5. Create some aeration in the canopy

for some air to circulate, within the cockpit, as the batteries could become hot. The 1 piece canopy will help, to access the entire cockpit, when needed. Also, no need to use the wood to close the cockpit, it anyways breaks after several flights. Just close the cockpit with some external rubber band.