For me all the flaws have been sorted.
The driveshaft blades have gone and been replaced with a better design. I only ever broke one driveshaft on its first lap which i think had a manufacture flaw anyway but i'm happy to see sprung steel and should be much tougher.
And it's been put on a diet. Didn't struggle too much to get it to weight but even lighter will make it easier to move weight around for balance.
Bulkheads being black should make it much faster.