Yeah i did the same, trimmed her down so hose clamp could just go on. Yeah the way my piping runs (factory Ht18 piping) it goes nowhere near the 2nd batt spot, plus the cobra head can swivel.Yeah I cut enough off the cobra that I could just get the hose clamp on. Can't take any more off. I couldn't see the battery tray making a difference if air box is mounted in factory holes though.
I wonder if cutting a chunk out of the sound deadener mat thing would help?
I'm away on hols at the moment but I might revisit it when I get home.
Did you notice any difference to boost (ie air flow) when you did it if you didn't change anything else at the same time?