I'm looking for an experienced vBulletin developer to upgrade my forum from vBulletin 4.x to vBulletin 5.7.x. Requirements: - Upgrade vBulletin 4.x to 5.7.x - Ensure all functionalities work post-upgrade - Backup existing forum data before upgrade - No custom modifications or plugins to consider Ideal Skills and Experience: - Proven experience with vBulletin upgrades - Strong understanding of vBulletin 4.x and 5.7.x - Ability to troubleshoot and resolve potential issues during the upgrade - Excellent communication skills for project updates Please provide a brief overview of your experience and estimated time for completion.