tips for improving at spotting?

I am struggling to make the transition from clean single to clean double pirouettes for a variety of reasons but one of the biggest is spotting. I *can* spot a single no problem but if I am not thinking about it, my head wants to do the skating style turn unconsciously with the body. On a single that doesn’t really matter so much. Going for doubles, it is extremely frustrating. I have the strength and the balance, though I have hyperextended legs so finding the sweet spot of leg and pelvis placement is sometimes tricky. If I think about it to the exclusion of all else I can spot a double but everything else goes out the window- my toe disconnects from my knee and the head (to maintain the spot) yanks way out of alignment. Ironically, if I am on my leg and rlly up and supported, I can do doubles without spotting, its like the skater style turn where the head is staying in line with the body, the problem is where I end the turn can vary a bit though by the end its slowing down and its easier to find front. But these feel a little more iffy- like just flinging myself into the unknown and hoping it goes well. For a double the speed and rotations is not so high that I am going to fall that hard or really do damage (knock on wood) but it just feels like skipping proper technique and the instability of not being able to place myself consistently on a plane with turns is not good.

Any tips? I live in a tiny apartment and it is very cramped so I don’t have space to practice turns here but I am in class four days a week minimum and my teachers help me there. They just keep telling me to “spot!” Which I know but it’s just not working. I would love to be able to spot. Tia!!