Bella has rotated. Alas, stupid me didn't get a top-down photo of Bella and Jake at the start of the experiment, which means I can't now measure how many degrees Bella has rotated by. I can show you the face-on pic from the start though, which shows Bella to be pointing a scant few degrees anticlockwise of the centre of the label. Today Bella is pointing approx. 45º clockwise of the centre of the label. That's a big difference. Also, Bella has not gotten any straighter.
What Bella's rotation means in the grand scheme of things is unclear. If Jake hadn't died then I could say that, with cuttings of this species, under these conditions, heliotropism beats phototropism. As it happens, this result is only borne out in 50% of my sample. I cannot say what Jake might've done because Jake didn't do anything. I can say that there is an isolated instance where, with cuttings of this species under these conditions, heliotropism has beaten phototropism; but I cannot claim evidence of a general tendency within R. fruticosus without further evidence. The behaviour of Bella is exciting though, as it suggests that I'm fishing where the fish are. I guess we know the shape of Rubus 4...
I'm going to throw some pictures at you now.