Last Tuesday I received an update from Tom Benjamin at Tele Vue.
The front doublet was indeed slightly decollimated (nice to have it confirmed that I was not imagining it ).
He said otherwise it looked good and will give everything (including the focuser) a check.
Tom said the rear doublet was pretty immobile. I then asked him about why they "sealed" the collimation screws to discourage end-user collimation. He told me it was a bit more involved than a regular refractor. As I was driving at the time I can't recall the fine details. I was not entirely satisfied with the answer, perhaps will call to revisit that after the scope comes back.
So this new moon window is probably gone too, but I will be looking forward to the winter constellations.