+1 on checking out the battery builder’s thread. First off, I can tell you that what you have done here is overkill for the current it will be carrying. Bus bars like what you’ve done here are not necessary for series connections. Many use this method for the main pos and neg termnials but for series connections it’s excessive. The way you’ve made your S connections also will not allow for any flex in your pack which can put undue stress on the solder joints and lead to breakage. Some other threads to check out are:
@Skyart makes beautiful batteries so if you’re looking for an example to to follow, the last thread I linked is a good place to look for inspiration.