Well, after I posted, I went and cut my T-Shirts and ironed the fuseible, trimed my blocks. So far, so good, have to go back and buy some more fuseible
In case you don't know, wash your T-Shirts, do not use fabric softner , do this before you start to trim.
My T-shirts are Betty Boop and I have Betty Boop material for the sashings.