Things I liked:Assembly was easy, function was easy to understand, builds up pressure easily. Things I would have changed:The need to pause at each end of the stroke was logical, but some sort of timer or indicator would help. What others should know:It is important to pause at the end of each stroke, both up and down, which took some getting used to.
Things I liked:Fit into the mar177 easily.
Things I would have changed:The conical washer, is apparently needed with the mar177, instruction sheet should explain that.
Also it seems difficult to insert the pellets without having them flip over, not sure what would help with this.