Using TuneECU isn't difficult, there are a lot of Youtube videos on the topic with demonstrations. The cable is importatnt because you can't use bluetooth with the 05 Rocket. I used my old Tuneboy cable with a USB-C adapter to my Galaxy tablet for my son-in-laws 2010 Speed Triple, but use a bluetooth OBD reader for all my other Triumphs. You can download the current tune in your Rocket to a TuneECU folder before remapping so you can always return to "ground zero" if all else fails. Also make sure to pull the headlight fuse or put the battery on a charger before commencing with TuneECU, it took 20 minutes to upload the Speed Triple stock maps and 8 minutes to download the 'Tune of Death" (which son-in-law wanted, and really likes).