let's not keep score on misteps - I might be pretty high on 'errors' also. I am doing okay using the ubitx on cw with a straight key - it is enough to calibrate us this is not a QSK rig. but I got used to it, and made many contacts. I imagine a paddle should work as good, once you land the recipe - either with stock of KD8CEC firmware. (there is a third source said to work better maybe, but try the easier path first).
let's not give someone a discount to have the 'challenges' we have been having - they can pay full price hi hi. this is some rig for what it costs. on SSB is so cool to work DX with 5 watts (no I don't have huge antennas here). enjoy the ride - and let the rig sit for a few days as required. a 'world' full of aid is here in the journey.
PS - don't wear yourself out on the simpler mods. AGC helps but is not huge. etc. nice you have a v5 - lots of info that the spurs are decent. CUL here