Sorry Tom but at the risk of repeating info you already know, the general rule that I have used for inversion processing is to use the Ilford time for 3200 and maybe a couple of mins more for good luck
The other way round the problem of compensating for rotary processing is to do what John Tinsley in his Rotary Processing book recommends which is to pre-wet and then stick to inversion times. D3200 wasn't around when he published the book but it worked for range of Ilford films then extant, so I see no reason why it wouldn't work for D3200
Hopefully someone here has actually had the experience that you seek
pentaxuser