I'm not in IT myself, I write software, so the IT guys work hard to make sure I can do my job without interruption. But just tinkering on stuff at home, I've had my share of frustration with cheap mini screwdriver kits. If I was a pro I'd never put up with that, I'd definitely buy The Right Tools.

Chain breaker is a very complex tool with funny shapes and moving parts, it would be quite a design job to come up with one of a sufficient quality to match your other tools. Levers are like the one exception that I think most bikers would expect to carry separately from a multitool, so I don't know that you need to focus on that.

But a spoke wrench, that's maybe something you could think about tackling. Take a look at the distinction between the 3-sided (Park SW-0/1/2, SW-7.2) and 4-sided (Park SW-20/22/40/42) tools and maybe you'll get some ideas. Maybe something based on the spinner, but slotted, with a 4-sided tool in the center? Two sizes (to match SW-40/42)? One spinner has both sizes if you flip it (in line with flipping the midget ratchet?)