That's a great review BBS. My Sandy story is pretty much the same as yours. I agree that these great basses just immediately feel 'right', kind of like they're made to measure rather than off the peg. As you say, much of that must be down to the Plek'd neck.
I'm on my second one now after selling the exact same bass you've just bought, immediately regretting it, and buying the gorgeous Cali II SL TM as pictured below. Just like you did, I had designed my perfect bass on the Sandy configurator, choked over the cost and the 12-month wait, then found that Thomann had a much cheaper one in stock with everything I wanted - except for the roasted maple neck!!
First thing I did was to fit my fave La Bella flats, decide that a slightly lower action would probably suit me better, note the complexity of the bridge - and put the job on the back burner 🙂. Luckily, when I drop-tuned to Eb to suit the band I was in, everything felt spot on so I stuck with the original set-up. Now I'm back to standard tuning though, I probably will lower the action a bit.
I've also been considering a pick-up swap to the superb Aguilars that are OE on my Vox Starstream but not sure it's worth throwing over £400 at what's already such a good bass. If I ever did sell it, I wouldn't get the money back.