Yeah although it has been more challenging than expected. For some reason I checked the face values more closely than the rest and still got them all wrong the first time. I thought copying a painting would make that easier but there is something about Sargent's style that actually makes it harder.
sorry to hear that! It's annoying how many troubles we have with the surfaces we paint on.
I "re-stretched" one of my paintings after it had dried and my strategy to avoid cracking or breaking the painting was to just stretch it gently by hand, leaving it not loose, but not very tight at all either. Worked fine but the painting was small so it was pretty easy. I'd recommend doing some research into this