Fin Advice

I have a new Soulcraft Da Honu and am loving it! I have fins for dual and twinzer. I don't really like the twinzer as the tail seems too locked in. I really like the dual fins but they are 5+ inches tall and I can't come close to doing a 360 as I can't get them to release. Should I get different fins or learn a better technique? I could do a 360 with my Hyperlite Broadcast 5' 6".

Thanks!