So with a din type there must be I am guessing 3 bus bars for single phase? And the plug in type, which is what I have now (square D) has the bar for clipping the breaker in and 2 bus bars (earth and neutral)? I noticed I have a couple breakers way oversized for the 2.5mm cable. I am amazed at how cheap and available everything is. For the isolation switch I was looking at "ABB Switch-Isolator WSD Series switch" on shopee, 63A. According to the stories I hear around me the PEA people want to wiring, I may just order the stuff and let them install it, What I am thinking --> Isolation switch box --> transfer switch unit (future proofing) --> consumer unit. Then inside the din type consumer unit >> surge protection (2 slots), under over voltage (2 slots), main breaker (2 slots) without earth leakage detection, then the individual breakers with earth leakage (30mA). If I didn't mention it this is single phase. Would all that put me over the target in your opinion?