In reply to David Kirsfelds:
Thanks for the replies. I have tried moving the tow bail position, but this has little effect on the angle of the front points really. I ordered some long bars too, even though the normal bar works for them. Compared to the normal bars they are exactly the same curve, only but a little longer! If they had made these longer bars a little straighter they would be perfect. I have tried reversing the bars, which does actually straighten out the front points but then the rear of the crampon goes out of alignment.
All I need is a straight bar and they don't seem to make one! I have emailed Petzl asking for some suggestions and will see what they say. As mentioned, it might not even matter too much...!