HPI Savage X/XL Big Bore Shocks Piston

This is my design for the full aluminum big bore shore for HPI Savage X/XL/FLUX. On the internet, these shocks are under different brands, most of them chinese (for example, NEW ENRON, JYDCET, RCAWD, but the design is the same. I have attached photos for your ref. In regards to my design, the pack includes 2 variations of shock pistons, both of them with 6 holes: a) 6 holes with 2.5mm diameter. b) 3 holes with 1.5mm and 3 with 2.5mm diameter, respectively