Thanks for the kind words.
No probs, I removed each flap one at a time and numbered both it and the mounting ring. I drew round the plastic flap onto thin aluminium which I cut out of a coke can. This was then cut out with scissors making sure I corrected the profile (a bit of seaman's eye here). Once all the cowl flaps were made they were glued one at a time using super glue, some needed a bit of trimming here and there but it didn't take that long. Don't forget to number the new ones as you go along, that way you won't get lost.