On one hand, I'd like to move forward in a rapid, directed manner. Doing so will require resources, however, and may inevitably constitute a full-time job. In order to fund such an effort, I'd need to show a near-term market fit - which will require me to approach this specifically as a business.
On the other hand, I'm aware that there are benefits to approaching this primarily as research. I ultimately want to learn; building a business is just one of many ways of doing so. Moreover, there are any number of businesses which address parts like mine, and selling bicycle products doesn't apply to all of them. It's possible that advanced supply chain logistics is a better fit for my knowledge and skillset. Focusing on the bike market might not be the best way to approach such a goal.
Regardless, it's likely that I refine and then purchase a seatmast topper in the coming weeks. This will require a small investment on my part (a few thousand dollars), plus about a week's work. I'll learn a few things about the process, and going through a build will give me an opportunity to cement relationships with suppliers and processing & testing partners.
Assuming the test part is functional, the next step would probably be to feel around the market a bit. This topper will be on the expensive side, and though I'm confident it'll sell, branding it will be delicate. Finding an audience, and defining the product in a way that they can relate to, will be an interesting exercise.
With a bit of luck, I'll have a working assembly + a landing page with preorders by Memorial Day. Stay tuned.