Hi I'm new to this , I have been diving for two years and served my time so far with bsac , I have been trained on the club compressor but I bought a portable bristol compressor with a Honda petrol engine it's a bit old but should do the job it's got a 14" by 4"filter tower,it is completely different to the clubs leaving me confused , any one who can give me step by step instructions it would be lots off help ,thanks