I did win an engine from a four-star ticket lately, but it was my fourth 13B, and I had already swapped the first two into each model it's compatible with. So now I got two 13Bs just sitting around, alongside some other engines I've yet to find a use for, like a second Aventador SV engine, or a spare LS9 from the Corvette C6 ZR1.
Personally? When the Holiday Campaign kicks off tomorrow and I eventually log in for the engine ticket, I'm especially hoping to get an engine that's expensive, namely from the Chiron, or one of the Group C racers. Sure, I've won an engine before from the 787B, R92CP, and the Chiron, but each of those three engines have more than just one car they're compatible with, unlike the XJR-9 engine which I haven't won yet.