A few years back I did research for a series of forgotten markers articles. One was a marker made locally here, Kirkwood NY. Then there were three others, including the E-Volt. I got to interview the VP in charge of the product. It was to be comparable in size, weight and speed of a 98. The piston was driven forward in a screw type rod powered by a drill motor, then automatically returned to ready the same way. The battery was one of the limits. It took a while to recharge, but for fields they had a prototype charging station that would hold 10 at a time, so that as power ran down, just slap in a new pack. And as the battery was at the rear of the stock, acting as the butt plate, just removing it rendered the marker safe. It was a ground breaking idea. But the breaking point was battery power, and motor speed. With new tech it could be done. But as it was for woods ball, high bps is not always a good thing. So there is what was, and what can be is the fun. If you do go ahead, keep us informed.
And no the articles were never published. One of the reasons was my writing style is dry, overly in the style of a college professor.