Thank you Wes and Glenn.
Glenn - I gave up on mixing subs from the 2 cameras. It did work and the two sets of subs stacked together perfectly. It just didn’t really help at all and made it harder to process. I have an STC Duo Filter now that I’m using with the modded camera and it’s a real game changer. I’m doing Trifid tonight and hopefully I’ll have enough data to stack straight away. It will be an interesting tester given it has 2 distinct separate areas of emission and reflection. Fingers crossed