I had to scour through all my tools to find a small enough screwdriver to use for the trimmer screw, which I luckily found a tiny eyeglass flathead. Still I can see it isn't ideal as I can see it wearing away the head as it doesn't fit precisely and it would be preferrable to use a philips head (#00 or #000?) for that trimmer screw. All of those 5-7 piece mini screwdriver sets in a plastic case that are common and made in China are still not small enough. Any recommendations for what works and will last a lifetime? Oh and hopefully it is available in the US.