Damian@DPM

The B4s are basically a gas version of the standard shocks, the B6 are a monotube upgrade but as mentioned fairly firm. If I was keeping the standard springs, personally I'd go for the Koni Special-Active. Damian @ DPM Performance

Drop us a PM with your reg and we should be able to answer your questions. Damian @ DPM Performance

If budget allows yes. The ST kit is the next step up from the AP in terms of the quality of the parts used and also the build. Damian @ DPM Performance

ST by KW would be my recommendation - https://www.dpmperformance.co.uk/car-parts/skoda/fabia/st-20mm-springs-shocks-suspension-kitfabia-6y-19992007-19tdi-vrs Damian @ DPM Performance

I'd go for the ST kit every time. Damian @ DPM Performance

Drop us a PM with your registration number if you're still looking and we can check what is available for your model. Damian @ DPM Performance

Have you checked what clearance you have? Hold something flat against the arch and measure from the tyre sidewall to that. Damian @ DPM Performance

What dampers are fitted with the H&R springs? Damian @ DPM Performance

Drop us a PM with your registration number and I'm sure we'll be able to help. Damian @ DPM Performance

You'll be fine with a 12mm hubcentric spacer - https://www.dpmperformance.co.uk/car-parts/skoda/octavia/hr-trak-12mm-hubcentric-wheel-spacers-boltsoctavia-5e-20132019 Damian @ DPM Performance

The front hub lip won't be as deep as the rear, we've found from experience that 10mm works on the front but 12mm+ is needed for the rear. Damian @ DPM Performance

From what you've said springs and shocks are going to be the better option for you over coilovers. Drop us a PM if we can be any help and we can get some prices and info on kits together for you. Damian @ DPM Performance

As above really. If we can be of any help just PM over your registration and front and rear axle weights. Damian @ DPM Performance

Drop us a PM with your reg and we can get a price for you. Damian @ DPM Performance

I'd recommend changing both the fronts and rears. Let us know if you'd like a price on the Koni's. Damian @ DPM Performance