Seems to be a few ex-Colt owners on here...
Since I sold mine i now have heaps of time to work on mowers! (Same thing really except my mowers dont have eight speed gearboxes)
On tailgaters, the best way to stop them tailgating is to do what I do.
Pull over to the left and let them past... Most modern car speedo's are not accurate. They legally can read up to 10% fast, but zero % slower then you are doing.
So you could think you are doing 100kph and you may be doing only 90!
I avoided this in my current car by getting the speedo calibrated. It is amazing how slow most people drive! I can now drive AT the limit (within the envelope of safety) and I simply dont get booked. Its also amazing how many drivers slow down for speed cameras when they are already under the limit. If they slow down "just in case" get your speedo calibrated. Its worth it for peace of mind!