I have lots of tools, so no issues there. Ha ha. I can figure out how to do it; it's just a matter of having enough space. But I don't have fat hands (XL length, but M width), so hopefully enough space, just to minimize the time spent changing bulbs. Will change both, even though the high beam is likely to never be used... but it'll serve as a replacement bulb, if the low beam happens to crap out on a trip. About how many miles are they supposed to last? Do you know? Since the low beam is on all the time, the mileage should be a good approximation, although a person sitting in traffic a lot might have less. I only use my bike for trips, so idle time is only limited when I hit a red light.