A neighbor who I've known for a couple of years asked me to make some auxiliary packs for him to use with 3 of his 6 TF bikes. He ordered all the parts needed to make the packs and I picked them up from him.
It's a good thing he did because the site where he bought the packs sold out fairly quickly.
Here are some pics of the raw cells and some pics of them partially assembled before the cases and connectors were fully completed. pardon my messy and overcrowded workbench.