Fantastic - thanks Michael! This method looks much better than the patchwork. That's an excellent start to getting a handle on this. Have no experience yet with subD (although did download Rocket as you suggested). Thanks very much for the tips to get rolling. Here is another arch top from the same guy - not really crazy about this arch top - it's a bit too flat on the top. Tried to attach the file - but am out of space. If anyone want's it let me know. Really like the dimensions in V4.