I have the Calypso and the Bipe... I tried to sell them for $125 at a swap meet, no takers! However, after seeing ozcan's bipe, I'm going to build both of them, and give them a try.... I don't think the construction is difficult (I have the Calypso ready to cover/paint), especially, if you have a kit or two under your belt....

Ozcan, have you had any trouble with the paint cracking on the Bipe... the Duraflex seems to be very flexible?