The original H20 daggerboard shape was hand crafted by Phil Edwards. The rudders are certainly quite different than the daggers. We are expecting to be given the go ahead to race the 20 with the same blade as on most other Hobies, so the EPO2 will be a good choice. They work very well on the 20. We can not offer any help on either foils specs / dimensions. There are no "plans" on them. Both are readily available for purchase, so if this is a "project"... have fun with it and let us know what you ended up with.