Yes, planning to try more "suspension tops" with cables instead of spokes. Some interesting engineering challenges there.
Or do you have some kind of contract with LEGO that does not allow for this kind of mixing something else into the system?
Surprisingly touchy subject. The "purists" among adult fans of LEGO use only official, unadulterated parts. They look down on some of the ways legitimate parts can be joined and might get physically ill if forced to watch me alter one. Some view anyone who doesn't build this way as a heretic. Every hobby has zealots. No contract. They do it to themselves.
Personally, I'm a selective
impurist, as are many who build working gizmos. Once I have a functional goal, I do my best to get acceptable performance as purely as possible. That's part of the challenge. But if the laws of physics insist, I'm off to the hardware store. Among my many sins...
o Parts of parts, like most of my top tips
o Non-LEGO functional stuff -- springs, elastics, strings, pneumatic tubing, electricals, boat propellers, etc.
o Rarely, metal axles and supports
o And a few times, (gulp) glue -- mainly for centrifugal safety.
There's a bounty on my head.