With just four rounds left of the 2019 Formula 1 season, the attention of designers, engineers and technicians has very much shifted towards preparing for 2020. But with a predominantly stagnant ruleset, development parts for next year can be given a good run-out in these final rounds to check windtunnel and simulation correlation.
But not everybody has given up on 2019 just yet. While there were certainly development parts spotted in the truncated Japanese Grand Prix practice sessions, there was also a healthy supply of upgrades for the rest of this season too, especially with constructors' championship placings - and the prize money associated with them - still to play for.
Suzuka itself is a circuit that requires plenty of balance, with good front turn-in properties and a stable rear end - and so any circuit-specific upgrades must be able to give a driver plenty of confidence on one of F1's most technical tracks.