Home grown Estamino seeds

Bit breezy out there,  the underipe pears are still hitting the ground with a wallop. We have pear jelly and pear chutney to see us through the winter.

Anyway,  I tried to graft 'normal' tom's to Estamino with not a lot of success.  I've allowed a couple of Estaminos to grow on and now have a few small orange fruits.  Can I use these seeds next year and try grafting again?

Cheers,  Tony.

This word "Shouldn't"...tell me more. 

I'll explain why I grew a mustache as a for instance!  Cheers,  Tony

But, but, but,  I'm grafting another tom' onto it and then cutting off the Estamino when (or most probably if) the graft takes so it "shouldn't" matter ? ? ?

Cheers,  Tony.

Thinking about it, I'm not even sure you'd get a better rootstock from a 'child of Estamino' than you would if you grew your toms on their own roots.. seems pointless to spend time grafting if you aren't sure that you are improving things.
Unless you just want to try your technique and don't expect to necessarily get better plants from your efforts. Only you know that