PIKO Goods Shed selfmade RC Rolling Gate (Gauge G)

I replaced the plastic gate from the PIKO Goods Shed (Gauge G) by a selfmade metall rolling gate which is controlled via a engine controller circuit and 2x channels of my 6 RC Controller.
I took advantage of 40 chain elements which imitate the rolling gate... this was on of my most difficult projects and was close to fail :-)