Me too! The P tone pup was the ticket for my AB-1. I spent maybe 30 minutes doing the change over, it was very simple. Drops right in, a couple quick solder connections and you are done. Might as well change strings, and give it a oil and wax, or you'll run out of fun before your coffee gets cold.
I have the Payson ground wounds on there and the retro "P with flats" is killer. I really like the feel of the Paysons both ground wound and nickel rounds, which I have on the AB-1 six string. I get a lower action with no rattle, even tightened the truss rod a bit. These strings are working with less neck relief than I've ever had. (I tune everything down a half step). I have a set of nickel rounds cut and wound for the AB5 in the case if I want to do a quick changeover. Since the two sets set up the same, I can make a change in maybe five miunutes.
I don't get along with stainless steel, so I can't comment on those strings.
I put a P tone in my Super J 5 as well, since I liked the sound of my Super PJ 4 in the passive P mode. That was a bit more work, but well worth the effort. Currently running DR Hellborgs on the 4 and DR nickel lowriders on the 5. The Hellborgs are my favorite for the SJ's but only come in four string sets.
I suffer from carpal issues, more when I'm working a hammer swinging job or windsurfing, less with lighter duty jobs. One of the features that attracted me to the Dingwalls in the first place was the ergonomic claims. More important was the total weight. Nine pounds is my limit. I make a small exception for the Super PJ 5. ( a little over 9 lbs there) The Super PJ 4 is closer to eight as are the AB-1's. Four inch wide Italia straps help spread the load.
The sixer can be a stretch (for me) reaching for the lowest notes in the open position. No getting around that it's a big bass, with a long, wide neck. Having a slim profile makes it as comfy as it can be. I tested the six against a Fodera 6 and there was no comparison. The Fodera weighed in at over 13 lbs. No thanks. If I want back and neck pain, I can strap on my old Kramer, 13 + pounds with some neck dive thrown in for good measure.
At the moment, since I'm working with guys who lean towards country and I don't need the extended range, the Super PJ 4 is getting all the love. Light, slim, and killer P bass sound. If I had to have only one Dingwall, this would be the one.
Either way, sooner or later, I'll have to seek some surgical fix. Getting old and working just plain hurts these days. Anybody had the procedure done? How bad was it, and how long until you could play again?