Converting the old Armattan Rooster to digital was easier than planned, and I'm thrilled with the result! This is a 6" build, which has the same body as the 5" kit. It's just as fun for freestyle as it is for mid-range crusing. In calm winds, it runs nearly 7min on a 5S 1300mAh pack.

Here's the original build in analog glory: https://rotorbuilds.com/build/14229

The old CLRacing F4S v1.5 is almost a perfect match for digital, with its 9V @ 2A regulator to drive the Vista air unit. But I'd already used up all UARTs for Crossfire and GPS. Luckily, UART1 can be freed for the Vista by disabling the inversion circuit through CLI: https://intofpv.com/t-turning-off-inversion-circuit-on-f4-flight-controller The "SBUS" pad becomes RX1, and TX1 is found on the bottom of the board.

DJI Mounting
Stack space on the Rooster is limited, so mounting the Vista was only possible thanks to the indivdual ESCs. I made a few small changes to increase stack height:

• Installed 3mm nylon spacers beneath the flight controller (borrowed from an old FC)
• Installed 2mm TPU spacers and a TPU 30mm to 20mm adapter plate above the FC. These were necessary to prevent the Vista from colliding with the FC and its DFU button. I had to manually cut off the standoffs embedded in the adapter print.
• Installed 4mm aluminum spacers to raise the top plate
• Installed TPU Micro to Mini camera adapter (slightly different design from the link)
• Rotated the Vista about 30 degrees and secured to the TPU adapter plate with E6000. Yeah, it's graceful.

Antenna Mounting

I kept the SMA-to-UFL adapter and mounting from the analog setup, since the Vista also uses UFL. The antenna is the cheapest LHCP with SMA on GetFPV.