How did the first frame turn out? Personally, after playing with carbon fiber I find welding or fillet brazing much easier however building a carbon frame is more interesting to me. I just finished my first frame with carbon tubes but I purchased them pre-made. You have more carbon experience than I do but I would think that using aluminum dropouts and bonding them to the frame would be the easier route, and focus more on building the carbon frame, however, if you can build a carbon frame you can probably make the dropouts as well. I build steel frames but am interested in carbon building as well so I would like to talk to you about your build and maybe get some photos. Keep us posted. Tambien tengo un amigo en Espana y yo hablo espanol pero probablemente tu hablas ingles mejor que el espanol mio. Hasta luego.http://meechcustombikes.blogspot.com/