Right, there are many things we average Joes will not notice. If you are only running on astro or carpet, the aluminium parts are a no-brainer except for the price. If I ever break a hub, I'll switch to the aluminium hubs for sure, but so far I am happy with the stock items. I'd like to try the graphite suspension parts to see if the car will land even better as they will also be stiffer and leave the bouncy work completely to the springs.
By the way, the way a car feels on the track can be very deceiving. One day I was running my B5M on the Duisburg dirt track with saddle packs, and it felt much better than with a shorty battery. However, laps were two to three seconds slower. Always check your lap times when testing new items!
