I've done a ton of testing with thrust bearings vs. the conventional cone washer + belville washer and have found that in 1/12th scale the thrust bearing works WONDERFUL.
However, as soon as I moved it up to 1/10th scale, it just proved unpredictable and just insufficient.
I used various thrust bearings, including the slapmaster, the HPI, and a couple I found on mcmaster.com (LOVE that place!!!) with a variety of lubricants, from dry to 10,000lb all of which worked "okay" but none of them had the predictability and fine-grain tune-ability that we can get by destroying a flanged bearing with the cone washer/belville assembly (and, yes, it does destroy them, they're not designed to be used in a lateral-thrust fashion)
I literally gained a LAP the second I moved back to the cone washer. The other person (radically different driving style) who was testing along side me had nearly the same experience - he gained 5+ seconds per lap.
Based on literally several months of struggling with thrust washers, I'd strongly recommend using the conventional setup:
by the way - your drawing has a couple of things - first, is your thrust bearing an actual thrust bearing or is it a normal bearing being used as a thrust bearing? I am making an assumption here!
Second, you have the belville washers (cone springs) reverse to the way that they are engineered. Belville washers are supposed to have the load applied to the "tip" of the cone with the resulting sprung thrust applied via the "base" of the cone - and your drawing has the load (the nut) applied to the base with no thrust being given via the tip, but rather at some point outside of it, which is both inefficient (not using the entire washer) and reverse.
By their nature, they work from "top to bottom"