All BEagle says is true. You mentioned the use of local knowledge. All's fair in love and aviation so use the knowledge you have but don't get suckered into track-crawling - aim to use specific check features but, if you fly over the top of something that you 100% recognise and that is off track, use the information. PPL Skill Tests are usually flown from your home airfield so the examiner wants to see that you know your way around. The CPL test may well be flown from somewhere different. Now the examiner want's to see that you can apply the correct techniques whereever you are.