Somehow I’ve got both trains running perfectly on 10261 😂

Yesterday I built the Roller Coaster 10261 , motorised it and up and running - somehow I’ve managed to get both trains going round the track at the same time without any drama. I’ve read loads about how temperamental this can be with chains slipping, trains not making it back to the lift, getting stuck at the top, losing momentum etc etc so I genuinely expected to spend half my life tweaking the thing. But after a couple of small adjustments both trains are continuously keeping their distance...