Nothing that you could tell the difference on, it would be miniscule.
The reason why there’s no 3mm tip top is it’s tough to manufacture that small and the durability becomes an issue on all the ones we’ve tested (including other manufacturers).
Many people shy away from rod building at first. Why? Even though in reality it's really not that difficult, it can be pretty mysterious at first. Splining a rod, attaching the handle components, and measuring the proper guide spacing all combine to deter many folks from this wonderful hobby. With GuideSpacing.com, we aim to demystify the process and attract more people to finally get out there and build a custom rod.