Hello all newb here from connecticut about to embark on a dual build . I'm purchasing a couple flying horses from BB. My first build will be for a 12 year old using a Micargi general . I plan on replacing the front hub with a Sturmey archer drum brake hub as the general only comes with a rear coaster brake. The other bike will be mine and I'll be using a Hercules I found in my basement. It has a 3 speed internal rear hub which I plan on replacing with a modern version as well as adding a drum from brake hub. a quick question I do have is how difficult is it to replace just the front hub with a drum brake hub as opposed to replacing the entire wheel? I'm referring to the general now,it has a painted rim and spokes and I don't want to have to try and match the paint on a new wheel.