[Andrés]

I might have found the same problem. But in his emails Zaracyn seems to have suggested that his ones were working so I thought it was just me.
We must also remember that cultures also affect repair rate. In the "balanced" culture file copied from Highliner Mod there are a couple of cultures with high repair penalties

I think it's very unlikely that the Motivator, a non-building SY + repair 1 that has been tested to work in single player games would not work in simultaneous.