Lets see here, Ender is about to hit 130k, I bought him at 85k just after he had a new tranny put in so i figure i have about another 30-40k before I have to start worrying about major issues with the tranny so on a personal level Im only doing mods that I will be able to pull off if/when the CVT finally goes (again). Things that have gone wrong on Ender in the last two years were, A/C line from compressor to firewall blew out (Total repair cost $500), Alternator went out (Cost $300). These are sort of expected in a car thats 9 years old but the kicker for me is the repair cost. Unfortunetly I cant justify lowering or doing any other High Priced mods anymore due to the life expentancy of my car and the overall cost to repair/replace stuff on Ender. Yours might be different but depending on the year and make of your MINI I would do some research on some know faults that might be occurring in the next few years to see if it will bebefit/hurt you in the long run.