Whats the optimal wheelset choice for a Scott Speedster Gravel 20 custom build, considering the bikes geometry and intended use on mixed-surface rides, and how do you balance the trade-offs between weight, durability, and aerodynamics when selecting a wheelset for this type of bike? Should you prioritize a lighter wheelset like the ENVE G23 or the Zipp 303 Firecrest, or opt for a more durable option like the DT Swiss G540 or the Hunt 4 Season Gravel X-Wide? How do you think the bikes handling and responsiveness would be affected by the choice of wheelset, and what are some key factors to consider when deciding between a tubeless-ready wheelset and a traditional clincher setup? Are there any specific wheelsets that have been proven to work particularly well on the Scott Speedster Gravel 20, and what are some common mistakes to avoid when selecting a wheelset for this type of custom build?