No problem!

Btw; I also found this gum producer/seller on amazon: https://www.amazon.com/stores/PUR/page/F6D80CCA-34AA-49AB-B8CD-FB6D030C415E?ref_=ast_bln

Good to be aware of if you want some more choices of flavour to choose from. Also, the gum that I linked to above is described as a "soft gum". So perhaps one of the gums found via this second link above are better.

Here is a direct link to one of the gums from the second mentioned producer/seller: https://www.amazon.com/PUR-Gum-Spearmint-pieces-Aspartame/dp/B00ARABK20

Given that it says "soft gum" for the firstly linked gum, I now plan to buy one via the secondly linked producer/seller (they also seem to be larger/more established). The harder the gum is the better. But most importantly I want it to be as safe and healthy as it can be.

Most likely I will need 10 or 20 of these that I chew into a big ball to get the resistance I need. I am perfectly fine with that though. I reuse the big ball of gum for at least 1 week or two, until I replace it with new gums that I chew into a big ball once again.