I wondered whether the signs could be made more clearer. Because SimV is made up of dark and light blue shades I wondered whether the little round icons could have their shades darkened and made bigger. Just a passing thought. Very, very minor I know, - I just thought it might improve the viewing.
But if everyone does not agree that they should then don't bother Pete, as I think you have enough work on your hands.
Regards,
     Ben