Has anyone had a problem setting up their Kinetic Rock and Roll trainer? I am trying to attach the unit that holds the bike to the base unit, but when I tighten the bolts, I can't tighten them enough to get to the desired starting position. They give you these spacers that determine the distance between the two units and thus how tight to make the bolts. But it seems like the spacers are so small, the bolts get completely tight before the top unit comes in contact with the spacers (you probably won't understand this unless you have tried to set one up). The bolts just get too tight, and the unit will not rock. Since I cannot determine, using the spacers they gave, to get the unit to the correct starting point, I don't know how tight to tighten the bolts. Anyone had any similar experience?