Never into BMX-too old-used to build skateboards though when I lived in Cornwall back in '74/5. We started building them longer for more stability and then seeing who could go fastest down a local hill-complete with hairpin bends-we got up to about 45 clocked on my mates escort van speedo-scary stuff in shorts and 'T' shirts-oh and flip flops of course since we were surfer dudes-madness looking back.
John