Using two LRS receivers at the same time with arducopter 4.6

[Michail_Belov]

I wanted to confirm whether the following scheme will work:

A few points about it:
There is one ground transmitter, Express LRS 2.4 Ghz set up with 16 full channels and Mavlink Telemetry.

There is one copter, RELAY, which has an express LRS 2.4 GHz Receiver, it is connected to FC, but only with the TX ->RX, so that the all 16 channels enter the FC of the RELAY copter.

The LRS Receiver is connected to mLRS 900 Mhz Trnsmitter with both lines, i.e. TX->RX, RX->TX

There is another copter, MAIN, which has two receivers,
LRS 2.4 Ghz, it is connected to FC with only the TX->RX line and a

mLRS 900 Mhz receiver, it is connected to FC with both lines, TX->RX, RX->TX, both receivers are connected on two different serial ports.

[Michail_Belov]

As can be seen, there are three links A, B, C

Now the questions/issues:

In operation state 1, all three links are active, Copter RELAY is controlled through Link A
Copter MAIN is controlled through Link B, and is retransmitting through Link C, but the RC signal is ignored while Link B is active.

In operation state 2, Link B is lost (cut off) due to signal loss. The idea here is that Copter MAIN now would operate through Link C, the control signal for which is retransmitted through Link B.

Would it work as intended, would there be any issues for switch over, both for LINK B being cut off and restored? Would it work without any scripts, just by connecting as indicated?

Also, a very big issue is this:
In operation state 2, if link A is lost, but link C continues, and Link B is also down, would that generate a RC failsafe on the MAIN Copter? If both links B and C are lost, from my understanding, we will definitively have a RC failsafe on MAIN. However, if LINK C persists with empty transmission because Link A was cut, I am not sure if that would generate a failsafe. This is extremely important, because it could lead to loss of control of the MAIN Copter which would not know that the signal was lost (I dto not have deep understanding of how LRS receivers work).

Also, I see a lot of issues for the telemetry/mavlink data… I think that for operation mode 2 (Link A and Link C active, link B down), the mavlink connection to MAIN copter should be working.

If Link B is active, then RC signal would go through Link B, but I am not sure whether the Mavlink would continue to operate through Link C<>Link A.

Before I start experimenting, and this does not seem that trivial,

Any input on the idea?