Hi, I'm Danny (67+) . Before I retired I worked for Porsche / Ferrari in Swindon, I have a KTM Macina Force and would like to derestrict the stupid 15.5 mph limit. I'm not after a huge increase in speed 18-20 mph would be fine, I find the range of add-ons a bit confusing (my age I think) what would be the best value and are they reliable ?