On this demo ZRa I have the Toe clamps for the axle were right against the backrest bracket so we couldn't go back any further without having the toe clamp share the same hole as the backrest bracket, which we have done, which I believe sets the COG at 1.0".

The previous spot was a bit much but all the way back is too far, I'd love to add another 0.5" back in but don't think it is possible. Can someone clarify this?

I called TiLite but got Mark, who doesn't say much, but said it was either one or the other. When I questioned how one could get 1.25, 1.50 or 1.75" per the order form he never answered; I speculated that it was made special that way if ordered, he didn't reply.