Front wishbone vertical bush experiments are not going well unfortunately, if that's what you mean gt? Stability on the brakes being an issue. Although, a firmer bush giving more control does show promise. Under most other circumstances anyway.
If only we could find someone to make it for us.
Main problem cross referencing with other models seems to be, that no other manufacturer that has a poly rearward wishbone bush in production uses a 14mm diameter bolt hole. They all seem to be 12mm max.
So we're scuppered there too.
If we are to achieve a working rearward/vertical bush, it will need to have a very firm poly material thickness of around 4mm surrounding a ball joint taking a 14mm bolt hole, with outer body diameter at 49mm within a depth of a 26mm wishbone, most other poly ball joint bushes are much deeper. (Iirc).... this has to articulate within a subframe frame gap of 46mm without fouling.
I don't think a ball joint is achievable within those dimensions and have enough material on a vertical plain to stop the wishbone/poly popping over the ball joint, sadly. The forces involved are massive.
Someone needs to come up with a new design specific to the omega. (Because most other poly ball joints currently in production have a deeper subframe gap to operate in) and we already know at least one poly bush manufacturer feels the omega doesn't have enough numbers to justify tooling costs.
It's a big ask, unfortunately.