I am in the process of designing and building the attachment hardware for my Kitfox IV for Zenair (use to be Czech) 1450 floats. I have my floats attached to each other with the spreader bars. This involved machining a 7075 aluminum fitting to attach the spreader bar streamlined shape to the round float attachment tube. I have designed the location and angle of the floats and built a jig to represent the aircraft attachments (my kitfox is at the lake on Lotus 1200 floats). Now I am getting the angles and length for my struts and cross cables. I have the attachment fittings designed but have not started the machining project. Of course, non of this has been tested in operation. I hope to have that completed later this summer. I can send you pictures of what I have if you wish to send me your email address.