When I put the "correct" boot lid badge back on mine (original design, a bodyshop had lost it and put the later type on  ) I used double-sided tape.
Can't recall exactly what type, but it was for car badge/trim/numberplate use. There are different thicknesses, but you do need a certain minimum thickness anyway to ensure a good fit (curved bodywork, flat badge) and mine was probably at least 2mm or 3mm thick - you really don't notice once it's on.
Inspect the back of the badge carefully too, there may be slight recesses for the tape.
And yes I used dental floss on the old one. 
As for positioning I consulted loads of photos, brochures etc. etc. and took very careful measurements of blown-up photos.
__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant.
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation".  (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! 
Finally: gone, but not forgotten.....
1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850!
|