I'm trying to decide whether to save money and time and go to my local dealer for the MP215 upgrade, or to go to Mountune HQ for the full-fat experience. Any thoughts?!

I wouldn't travel all that way myself for just a remap and airbox, if it was a bigger job I would consider it. On the other hand there's probably a few dealers that don't know much about doing it. Some people also use Mountune for servicing and stuff too, just a very long drive from up here.

My thought exactly! My local dealer wanted to charge £1100 for the MP215, but I found a guy in Derby who knows his stuff and will do it for MT price + postage of parts.