Tim & Michael,

Thanks for response.
Gives some items to check through.
Will measure kite luff, do not think Irwin would have got that wrong but will check.
The mast position is still a work in progress as had no reference point when rigged for first time the other day, so I may stand it up a little more.
The pole is set up to sit just below chute mouth and connects to main beam, so I will check bridle height as it may be much higher than the 380mm.
The pulley position, I thought, is as per specs but maybe I got that wrong - it was very late at night when fitting that.
As chippies say measure twice then cut - maybe I stuffed it up.

Yes I have been on the VMCA site and checking the photo's of other rigs to work out what was amiss.

Thanks so much for your info - it makes it that much easier to sort problems out.