Hey guys, just after some advice. I've been lifting weights on and off for years, always at home. I'm after some cheap cast iron weights as it's getting tiresome taking weights off the barbell to stick on the dumbbell and vice versa, I'd like to just move straight onto the next exercise without the pause. Can anyone recommend any places that sell 20kg+ cast iron weights? I was also looking into places that sell heavy barbells that are already like 15kg+ in weight. Last question, might sound a bit silly but never really seen it answered anywhere, is it safe to leave a weighted barbell resting on the bench? Talking 100kg+, I've got your bog standard bench from Argos but I worry that the whole thing will eventually snap if I leave weights resting on it. Maybe I'm just getting impatient. 
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