Noob here with a couple of questions, poop chute, printed square, etc

Hi,

I just received my p1s and have done a few prints, the latest using the AMS.

What is the point of the printed block, as I expected this would reduce waste, but it hasn't, as there is a good bit of waste as there are a lot of colour changes.

Poop chute, why does it start to grab onto the inside of the chute right at the top, as if the head doesn't move far enough back? If there is nothing there it can still attach meaning even having a printed chute won't help, or at least my understanding.

Can poop waste be reduced it I also print a taller object that I don't mind the colour of, like storage trays?

Printed the usual so far, benchy, spring turtle thing, couple of optical illusions, and a fat floppy dragon.

Thanks,

Jim