As suggested I did eventually email Paul Akers just to say the circular seam on the GluBot is a weak point.
He emailed me back within minutes to say he will send me a replacement.
I emailed him to say I'm not in the U.S.A. - I'm in England, my email was only to mention the seam, I don't mind using a puncture repair patch to seal it, it really isn't necessary to send a new one and I'm sure he could see from the photo I sent that it's been well used for some time.
He emailed me back within minutes to say he doesn't care if I'm in Siberia, he wants his customers to be 100% satisfied with Fastcap products and he will be sending me a new one. He also said the new GluBot doesn't have the circular impression in it anymore.
I'm 100% impressed.
Thank you also to copcarcollector and UncleJoe for telling me.
This is what arrived in the post today.