I'm thinking about picking up one of the "Slime" branded air compressors; priced around $30 depending upon where you shop I suppose... It had a decent review in in the US MCN. The CyclePump seems a little expensive and perhaps bulkier than the Slime model but it's hard to tell from the pictures. Is there enough room under the passenger seat; i.e. tool compartment, of an F4i to fit either of those?