I thought this might help you! I have just managed to record channels simultaneously.
Here is my setup. I am running OpenVix 5.1 Build 33 on a Vu+ Solo 4K dual FBC tuner
Unicable 2 LNB attached to Tuner A
Tuner A
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
SCR (Unicable/JESS) type: LNB
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 1 (1210)
Connected: No
DiSEqC mode: None
Force legacy signal stats: No
Tuner B
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
SCR (Unicable/JESS) type: LNB
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 2 (1420)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Tuner C
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 3 (1680)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Tuner D
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 4 (2040)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Tuner E
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 5(984)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Tuner F
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 6(1020)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Tuner G
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 7(1056)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Tuner H
Configuration mode: Advanced
Satellite: 28.2E
LNB: LNB 1
Priority: Auto
Type of LNB/Device: SCR(Unicable/Jess)
Manufacturer: Inverto
Model: IDLU-32UL40-UNB00-0PP
Position: 1
Channel: User band 8 (1092)
Connected: Yes
Connected to: Tuner A (one with wire attached)
DiSEqC mode: None
Force legacy signal stats: No
Ron