long story short... demoed a 289Cat with Cat HM315 mulcher. worked great!!! Bought used FAE UML SSL 150 (same as HM315 just older) It was setup for a 299Cat and had 1" hoses and quick connects.. replaced 1" quick connects with standard 3/4" but left 1" hoses. I also did nothing to the electrical connector for trap door. ... My question, Will a mulcher that's setup for a Cat 299 work to capacity on a 289? Something is wrong. I am bogging down in very light material. The 289 with HM315 that I demoed seemed to turn much faster with more torque. Any thoughts? thanks!