Finally completed.
"Like magic, as if a variable piston"
Valiable Magic --PISTON
(Variable damping force piston)
It will take a long time to talk about detailed theory 
As an easy-to-understand effect,
if you imagine it like this
I think that it will lead to something that you can feel when you use it.
But、
By balancing the volume of the cut part (red part) with respect to the piston hole (blue part)
The precision of processing was very important and it was delicate whether it could be made.
I managed to make it 🎶
This balance was important and I had a hard time.
"As the flow velocity increases, the pressure decreases."
When you become oil and imagine
I think you can imagine the effect of this piston 
The part of the tire work I've always wanted 💨
The actual car is made of rubber and air, and the tires absorb a lot of small vibrations 💨
However, with "RC DRIFT" that uses hard tires
Tires rarely do that part of the job 😅
Tire work that I've always wanted since I started "RC DRIFT".
I've done various things for 15 years with parts other than tires 😅
Perhaps there are many people who did various things with the same thoughts 😁but,
The balance between the weight of "RC DRIFT" and the grip of the tires does not quite match the image of the actual tires 😅
In the end, you end up asking the damper for that part.
However, if you ask the damper for the work part of the tire too much,
Originally, even the work part of the damper becomes fluffy
On the contrary, the road surface and the tires repel each other.
Also the initial movement from the 1G situation
Even when a load is applied and the damper shrinks, even slight vibrations occur.
Even the slight vibration from the stretched situation
The part of the work that the tires of the actual car do
I hope the damper will do the job.
Feel the feeling of scratching while feeling the grip raised by pressing the tire against the road surface with the load firmly placed on the actual vehicle
Someday I can feel it even in Dori Raji 💨
However, it is still far from what I want.
Keep asking without giving up 🎶
"Real Dori" is really interesting 😁
※Sorry for the poor English※