Window replacement parts

I'm sorry to hear about the trouble you've had with the hardware you purchased. I'm going to need some answers to help you, though. First, is this aluminum window used for residential or commercial, like schools? Second, what is the diameter and length of the plastic balance tube? I would also like the width and depth of the pivot shoe. Finally, instead of using a side mounted pivot, are you able to drill under the sash to mount a pivot bar?