I've drawn up my own plans based upon the ones you can get from
backyardhive.com which is a completely different hive to what you can buy.
I was going to go the whole kit and kaboodle into Langstroth hives until I started reading
BeeGuardian.org - Honey bee, Pollination, Bee Guardian and decided I'll give my hand a go at organic beekeeping, no smoker, no extractor, no queen excluder, no medicines and modern chemicals, just plain and simple beekeeping which appeals to me as primarily a mead maker and secondarily a gardner.
I still want honey so I took the Golden Hive dimensions and redrew the plans I had up calculating all the new angles and dimensions.
That said Top Bar hives are made in Kenya for like $5, so I'm not about to drop $300 on a fancy one, I'll just build my own