The servo and ESC connectors I have are all tapered as well. I finally managed to edge in the connectors on the other channels, but there was no choice but to take a sliver off the side of CH1 to make that fit. Even so, all the channels are still a pain in the arse. During race days I usually have two cars between which I switch the transponder since I only have one, and that's gonna be even more of a pain in the arse with this kind of receiver. Maybe I need to use a small dedicated battery for the transponder. Got plenty of those coin-sized ones, would just need to sort actually connecting the transponder to one with some wiring.

And I only just realized that moving the trigger moved the entire trigger without affecting the throttle/brake ratio, silly me misunderstood that one. Oh well. I just measured, and the brake trigger movement distance is 5mm in the MX-V and 8mm in the MT-S so there's indeed improvement nonetheless, but still a far cry from some of the other radios that seem to have equal movement to both directions from neutral. But, hopefully it's enough combined with the curve adjustment.