The ideal syndicate has one member.
Yes and it would be round a Spitfire for me - unfortunately, like many others my finances do not stretch that far, and like many others I need to compromise with what I fly. 10% with the other owning the other 90 can work very well, at least you will not be competing with 9 others in this case, most aircraft are under-utilised and generally you will get good utilisation, but good if you can get some sort of guarantee on when and how much access you will have.