Looks like you’re having fun and all is going well.
Did you notice any spring back when you took your pcs off the form?
I usually will cut my form in about a 1/2" to 3/4" more on each side so that when I get spring back it springs into the position I originally was after. Another thing that helps with spring back is to use powdered urea glue. It doesn’t have the creep like titebond does and will hold the curve tighter. For what you’re making it isn’t critical though, so venture on and keep us posted on your progress.
Nice job on your forms using leftover and recycled material.