Jones. A bound state of e- e+ e- (about 10^12 % according to CRC tables) is known.
With a mass about 207 times that of the electron and about 0.5 MeV they could make a burn spot on the center of your old TV CRT before they came up with the bent gun. OTOH, a 1/207 fractional hydrino orbit of 2800 eV would be a hefty energy release if they are in potassium or argon. No? Fred