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I just build a 10mm Serval cub (465) as cast. I'm running pods, 35mm carbs, chariot intakes, VF4 reeds, chariot cool head with 24cc domes (kicking compression 155lbs), shearer SB in frames. Timing is set at +5 with all stock ignition minus the timing plate. Fuel of choice right now is Avgas mixed 50:1 with Amsoil. Leakdown test held 6lbs solid for 1.5 hours. Right now I'm running into a problem that im hoping you guys can help me with. Im running 42 pilots, 135 mains, cgm needle on top clip. My machine is acting rich but i feel like im way to low to go any leaner. When my machine gets under heavy load like when hill shooting it has a hard time staying in the powerband. as if my pipes can't clear and its bogging out. Here are a few video clips of me out testing and tuning let me know what you guys think. This was with a 148 main this was with the 142 main I picked up more speed with a 140, 138, 135.... but im worried about being way to lean. Any other issues you guys might be able to lead me toward or is it just a jetting deal is all?