U have to have exact mesh size and deep(how long) for it to works. And there’s are a lot of trial and error to get it perfect lay flat without the “witch hat” and extra around the outer circle.
I never built 4 o 5 panels before I mostly build 6 panels and one 14ft someone make for me have 12 panels. The more panels the better it will open and lay flat. Downsize is there are a lot of materials and a lot of time to built which result cost more and it also heavier just the materials itself without leads and it also bulky to hold on one hand to load which can cause palm pain after a short while and you would need a lot of strength or different method to cast all that material out to spread it. I’ve open my 12.6 ft 98% of the time but the 14ft is harder
I have a method that is 100 better ...no staggering pattern on the cuts for the panels .I have built them in your method ..i prefer the way I have learned which was from a fourth generation commercial fisherman in Florida.....buy it is so easy to cut and to mend or sew together ..and there is plenty of bunt ...and very strong ....have gotten plenty of 400 lb shots with a 12 ft net during the mullet run .....but its a 5 panel net end up with 100 meshes on the horn I've been contemplating making a video for a long time maybe I will lol and doing it the way I say it can not just be cut down to size afterword...you need length (radius) first