Valves and pump's mounting parts design

At the beginning of April, I designed a pair of mounting parts for the valves and pump. As is shown in the figures, the first holder is the main holder. The pump is perfectly stuck inside the structure, and the valves are fixed on it using screws. This holder is fixed on the chassis also using screws. The second holder is a bracket which brackets the cylinder of the pump and valves. It is not exactly working as expected because there is still room between the bracket and the cylinders. But it can be easily solved by adding some material in between. Unfortunately, this design doesn't appear on our final model due to the change of the overall design.