I`d like to add my thanks to those of Sparky`s, the series of photos are very informative, & a great help to us novices wanting to aspire to do such things.
One thing I'm having trouble with is the length of each piece, I have the angles right but it seems I'm short on length ............yes I know.........I blame the tablets!
if you cut the segments 50mm that should be just over 7" only glue the ring in 2 halves then if there is any gaps when you attempt to glue the 2 halves together you can sand the 2 halve segments to rid the gap and have a perfect ring on glue up.also make your segments about 1" wide that will give you a lot to play with.
glad to be of help to you,hope to see your photo when it is done.
i have started my next segmented project and hope to do this one a little bigger than the last one. hopefully this will be 8" wide and about 14" high hope it works out.