I have now fitted the Autotune AT-200. It's now May, it has taken this long for me to get a tuit and acquire a new exhaust pipe for a local firm to TIG-weld the 18mm bung into. When Dan removed the 12mm bung he found the pipe was already drilled 7/8-in (22mm) for the 18mm bung. He had no problem removing the weld, no need to drill a second hole.
Using the Autotune disables the second PCv map. The Autotune switch enables base map only or Autotune + base map. Autotune writes a trim file at the same time as applying Target AFR (air-fuel ratio) but you have to write a Target AFR table which is slightly guesswork. And the EFI 500 is a lean burn. I used a Target AFT table borrowed from HD, it is probably a little rich. I shall have to fiddle with it until it mostly matches the Hitchcocks base map.
The AT-200 is making some fairly large changes to the Hitchcocks supplied base map, mainly at the lower and mid-range positions, the cruise range. There are a lot of noughts in the trim table further up the revs where the Hitchcocks' map is 'correct'. I have yet to 'apply' the trim table, I shall clear the first few until I understand it better, and then acquire more data. Applying the trim alters the map, it is important to make backups.
I spreadsheeted the base map and noticed some rather alarming peaks and troughs at the low-mid positions. What is happening with the AT-200 on is the running on the road is very much smoother and more tractable. The AT-200 provides a real time display of the AFR from the wide-band Bosch O2 sensor, without the AT-200 on (running on the base map only) it is all over the place.
The stock oem narrow-band Lambda sensor can only make AFR adjustments in broad strokes through the ECU and is disabled when running the PCv. The broad-band sensor can make fine on the fly adjustments through the AT-200.
Of possible note, the current AT-200, or at least this single cylinder version, does not need the CAN-Bus terminator plug and it is not supplied with one.
There are a couple of workshops that have bike dynos around here. It strikes me that they use the machines to tune sports bikes for max power but pay little attention to the cruise or pottering range.