I'm looking for a reliable handyman to replace a faulty toilet flush mechanism in my bathroom. The current chasse d'eau leaks occasionally and won’t always flush properly. Ideally, you have experience with toilet internals, supply a compatible new flush valve, and can ensure a watertight seal and proper overflow safety. I prefer a tidy, respectful approach, bring basic tools, and can accommodate a mid-morning visit. If you can assess whether the issue is the fill valve or flush valve and provide a quick, straightforward solution, that would be great. Please include an estimated time and whether you can source parts or if I should provide them.