In my own opinion i use siser stretch on all my clothing, 50/50 60/40 and so on. It looks like your top is actually to small. But your saying they all stretched when you used the pillow under them?
I have never had a pillow stretch issue if thats the case nor heard of it before. I use a hotronix fusion 16x20
Have you done these types of tops before?
as far as i have seen and dealt with. stretch can only go so far. if the tops have more stretch than the vinyl etc it will stretch it beyond its normality if some like your self put the top on and flexes it out etc.
Not sure if i am going to be any help or not. But i will ask some people i know as well on my other forum.
I have never had a pillow stretch issue if thats the case nor heard of it before. I use a hotronix fusion 16x20
Have you done these types of tops before?
as far as i have seen and dealt with. stretch can only go so far. if the tops have more stretch than the vinyl etc it will stretch it beyond its normality if some like your self put the top on and flexes it out etc.
Not sure if i am going to be any help or not. But i will ask some people i know as well on my other forum.