Oh before I go, here is the stupid irrelevant answer you wanted.

The sub harmonic of the electron up quark would have a rest mass of 0.34066 MeV which is 2/3 the mass of the electron.

But do to high energy density if its quantum space, see MIT bag theory http://en.wikipedia.org/wiki/Nucleon
the up quark would have a perceived mass of 4pi times that amount minus the starting energy density for a perceived mass of 3.9401998 MeV

This is within the 30% range of values given by versions of the standard model like, Skyrmion http://en.wikipedia.org/wiki/Skyrmion

You were aware of the large range of values given for the up quark by versions of the standard model, right.

http://en.wikipedia.org/wiki/Quark 1.5 to 4.0 for the up quark.

Happy now, it did not prove anything.