Quick question, I want to add some MOT type 1 as a base to lay paving slabs for an inflatable hot tub base. I want a 75 mm depth of mot 1 as a hardcore base. My question is, how much would i need? The length of my patio area is 2.4 m and width also 2.4 m. Would I be better off buying a bulk bag of MOT type 1 which is approx 850 kg from Travis Perkins or would multiple small bags of MOT type 1 be ok? I don't want to be left with a load of MOT type 1 at the end if I went for the bulk bag option. Thanks.