Hey guys thanks for all the input and suggestions. Ive since replaced the brake booster with a refurbished one and so far my brakes are feeling a lot better, ill give it a good run and post the outcome. Cheers
Xr50t, I had the slide pins checked by a mechanic to be sure before changing the booster, I was told they are in "good working order" and I have to admit the calipers themself seem very tidy, possibly allready been replaced by previous owner.