I'm trying to build a custom Ti gravel frame. Waltly seems to be the most popular one. But I'm also curious about the other ones. I'm also in contact with xcad and Titan, both of which have been more responsive and detailed with their responses. I can't find much reviews on the other 2. How do they compare with each other in all aspects ranging from build quality, design options, warranty, customer support, or anything else that comes to mind? Please share your experiences and findings