Most important upgrades on the 410R would be replacing the hinge pin blocks for the aluminium ones from the 410 or the new ones from the short course.
The shock and driveshaft boots might be an idea as well along with the different o-rings for the diffs when you're building it. You might also want to cut off the outside hole on the front shock tower to stop it digging in so much when you land upside down.
Apart from that there isn't much you need to do to it.
Carefull with the upgrades though or you might end up wishing you had got the dex410 in the first place.
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