The inner carb opening on the 2300 is 11mm according to Tower Hobbies and the inner opening for the OS 160 is 9.5mm. That means the 2300 has a larger carb than the OS160 and that might very well be the problem. I think the reason I saw better transition with homemade glow system is that it kept the glow plug light and prevented it from going out as the unatomized fuel poured in. I still saw hesitation even with the continious glow system.