I really like T&D and Harland Sharp. However they both must be entirely dis-assembled cleaned and lubed. The last set of T&D came with specific instruction to install as-is, out of the box, as they had been specially lubed and assembled prior to shipping. I NEVER install a rocker system without cleaning them myself. One shaft was assemble DRY and all of them had gritty adjusters and debris in the system. Inspect and clean every piece of your engine prior to assembly. Don't trust anyone, double check everything.........ah....hold on, that sounds awful........trust everyone but VERIFY everything.