Ah the glorious design engineers.
This is how they used to do design repair schemes up in Aberdeen for the S61's.
1 Licensed engineer finds corrosion hole where engine bay meets the structure under the fibreglass fillets.
2 Licensed engineers makes up suitable repair plates I.A.W the repair manual.
3 Licensed engineers takes the plates into the office and photocopies them, rivet holes and all.
4 Licensed engineer faxes the copies to engineering in Aberdeen.
5 One week later a set of drawings appears with all the little engineering bells and whistles on them.
By then the aircraft has already being flying for a week.