Originally Posted by macrs

Do you still have the load compensators on the back?? If they're sticky or not set up correctly that should account for poor rear braking?? I know it was on mine at its mot last year.

As for your fronts, I don't have the knowledge on four pots but I believe they're a bit of a pig to bleed??
Or could the master cylinder be drawing air??

I say this as I removed my ABS last year, re-piped the system and fitted cossie discs and calipers as well as fitting a new seal kit to the master cylinder. Left the drums on the back, set the rear compensators up after cleaning them, flushed and bled the whole system and my brakes are spot on now.
Hope this sheds some light for you!