I have looked at the two recumbent bikes you are trying to work with , for a very long time .
over 10 years at the Bike E, and for a few months for the Cannondale , ever since you started this thread on it.
I have found one Cannondale and several Bike-E's for sale
However , Every time I look at them I know I would have to modify most everything on the bike , so I keep waiting for ...
Someone here in the U.S. ( or Canada )
To build a very long wheel base recumbent and/or recumbent trike that is designed for back road vehicle speeds.
Read : very stable bike at high speeds for a bicycle.
With a fairing around it , and or some tubing on the outside of my hips extending up to around the feet in case of a crash or even lower speed lay down to save my legs and feet and even upper body from injury .
I have even tried for over a couple of years not to get a Machinist I know to Design and Make one but he is busy 12-15 hours a day on other work.
the Recumbent in the Vancouver area of B.C. that tigcross makes , ( Electrom V 2 ) keeps getting delayed .
Someday soon I will find , so that then I can link some designs that have been done in Europe to this thread so that you can get a basis for ideas for a simple , more upright seating velomobile type of recumbent .