Hi Ron, good start on that project, it's looking good so far. It's been a long time since I've seen someone use the pin and packing method for getting a good, repeatable radius. It looks real fine on those bumpers, and you can get a good repeatable concave radius if you put the pin between the carriage and the tailstock, I've got half a dozen "center pops", on both sides of the carriage and on both head and tail stock for pins. Those frames look nice too, crisp and on size from the pictures, personally, I like to rivet when ever possible, it makes a stronger joint than a screw can ever imagine, and when it goes right, it's quick and easy, and one can set quite a few rivets pretty fast, just going down the line. I'm looking forward to the putting together of the more intricate parts, in and all around the frames. Great Start, ought to be something to see run when it's done. :jaw:mad jack