Hi there, apologies for the slow reply!
i feel your pain concerning ergonomics! After changing basses far too many times i settled on Dingwalls a little while ago, and have now fully made the transition to the fan fret system. They are light enough that i can play three sets in the evening without any shoulder pain, very flexible on tone for different genres!and i find my left hand has no stiffness at all after a gig. For me these three things are pretty huge!
i have the Super PJ, which i find really good for solid ‘in the pocket‘ basslines. Anything which means good lo-mid, and non muddy bass then this bass flies. Its not as flexible in the upper register or super zingy if you know what i mean. I have the Pau Pau fretboard, so perhaps the maple would be different? However, when i am playing James Brown, motown or anything that normally suits a P Bass its quite phenomenal. The neck is the best i have played. Ever. The only but for me is the short scale at 32”. I have long monkey arms and prefer longer scale. For others this will be a good thing, so judge for yourself.
i also find the banjo frets, and string tension give a great playing experience and sustain that goes on and on and on…….
i also have the Combustion 4/2, and recently the NG3/4 and its these two basses that get taken to most gigs. The neck feels more Stingray than Jazz but still super comfy. But the tonal range, especially for Funk, and Dance stuff means i dont have to use an external preamp which i normally would with the Super PJ.
dont be fooled into thinking that these basses are one trick ponies. Alot of reviews show people using them for Thrash Metal etc, because of their association with Nolly Getgood from Periphery, but they are great all rounders. The pre amp is very flexible as is the pickup selector, and it sounds great passive as well as active.
i would recommend trying both before you make a decision. The Combustion/NG range are quite a bit cheaper, so worth a look.
but be warned once you have made the move to Dingwall and fan fret there is no going back !!
Let us know what you choose and feel free to ask any questions.
cheers, Mike