"The most important task at hand is experimental. Based on our considerations of dynamical symmetry breaking through preons and the assumption of universal size for all quarks and leptons, we are led to predict that quarks and leptons have an inverse size of the order of 2-3 TeV. This can be tested by high-luminosity 5-10 TeV machines in the near future by looking for form factors for quarks and leptons and for excess production of lepton pairs in pp or ppbar collisions."

Jogesh Pati, "Preons and their implications for the next-generation accelerators", Proceedings of  the third annual workshop of the ICTP Summer Workshop on Particle Physics, Trieste 1983, p. 399-459.