Hi all, I managed to grab a 2nd hand JB1 kit off ebay for £130, and it's due to arrive this weekend. I have watched a few videos on Youtube, but some actual owner advice would be great! 1 - For fitting, everyone mentions a plug at the bottom of the front of the engine, can this be accessed from above or is it an undertray removal job? 2 - Real world gains, will this improve my MPG with casual everyday driving? 3 - Will the increase in power be obvious? I believe these kits add around 50bhp?