Agree with the above, overhead and I ride my 7'er but charging bigger stuff on the LB is a pretty fun challenge and there's plenty guys/gals who do it well and the old school guys used to manage with much slower/heavier equiptment, its all in the technique (of which i'm totally sh1t btw

)
But, it can also be the board, the shape of the lb, I can make some crazy steep/late take offs on the 10' Hot Log because I can get in really early due to its paddling speed and know how to position her but if I try and run the Sweet Love, aka the Caddilac on the same waves i'd get creamed....
There's also a couple of tricks that I picked up from watching JC in Indo, Harly Ingleby and CC
1. Cross step on takeoff so your immediately on the front 3rd of the board. Which is bloody hard because your brains saying "hold on and make the drop" but you need to step so your on the right section of the board or you wont get the right rail/trim/glide to make the section.
2. Nose takeoff, taking off too far forward on the board, this is really tricky as you mostly pearl but if you drive down hard with your toes this counters it, Corey Coolapinto is the master at this one.
Just keep trying and experimenting and enjoy wiping out, I've become really good at that bit