[Healeys] Top bow positioning on a BJ8

[Bob Abbott]

Listers,

Recently had a new top installed on a BJ8, Now, when the windows are rolled
up and the door is swung closed, the rear of the glass overlaps the top
canvas by about 1'. The window line is perfect with the windscreen
post/frame. So there's no way to move the window forward. But I can't see
any way to move the topbows rearward. What adjustments can be made to the
top bows.
Is there any web site with instructions for adjusting. Or does anyone have
any insight as to how to correct this lousy fit?
Thanks in advance,
Bob