Jojoc, The process for putting the curves in the legs:
1. Make a bow compass with a steel yard stick - tie a string to both ends, pull into a bow and clamp the string to the radius you like. This one started ½” down the leg and penetrated 3/8”.
2. Mark the curve on a pattern master. Use hardboard, rough band saw it and smooth it with a file and sandpaper.
3. Mark a leg and remove most of the waste with a band saw.
4. Mount the hardboard pattern on the leg, and using a router flush trimming bit, transfer the perfect curve to the leg. Makes the curve smooth as a baby’s a--.
5. Relies in the planning stage that the flush trim bit can only cut 1-1/2” thick stock, and the legs are 1-3/4” thick (I created a few new words at this point).
6. Mark a leg with the compass, band saw it, then use a spindle sander to smooth it out. Check the shape with the bow compass while doing the final shaping to get in right.
7. Repeat #6 using the 1st leg as a master for marking and comparing the shape.
I could have bought a 2” flush trim bit for $40, but I am too cheap.
I used a regular compass for the curves in the stretcher uprights. Band sawed and spindle sanded to the line.