Just to make this a bit clearer ,When I fitted my Le Barron headlining in my coup in 85 I thought at the time I could make this my self,as its just a rectangular piece of cloth 56"X 50 (or enough to overlap the roof cavity ,)with three panels or seams sown across it , 12" then 15 .3/4 then 8 1/4 You can check this measurement as it should be the same as your wood bows and have a little overlap ,on each seam you add some scrap material ,like a 4 to 5" width of Denim folded over on its self and ironed flat,sow this in with the sowing ,as you sew across ,This could be tricky as you need to sew only once and sew straight ,I am sure Daves Missus can handle the Job ,As it needs to slide over the first rear bow the loop needs to be wide enough ,The others don't matter so much as you tack through the excess into the wood ,Start by sliding the loop over the rear bow then temporary tack to the front of the next wood rib , then tack through the head ling cloth into the rear tack strip .all the while holding it firm .Move towards the front onto # 2 bow tacking on each wood bow ,The final tacking is done under the front header panel .As you move forward slide the loop over each wire provided at the edge of the bows it takes place of the tacks so you dont tack fully to the edge ,You may need to cut here a little at the denim were it meets the roof edge to get a smooth Finnish .You then tack along the sides pulling it firm to get the seam lines straight ,There is a special soft piping that covers the tacked edge ,