[willwade]

Use those a lot to (always try and focus off the shelf first). But for cases where we need to position differently we often need something custom

[makeitdouble]

Thanks! About off the shelf but customizable, slightly off topic, but Keychron is producing one of the smaller trackballs with full button mapping management:

https://keychron.co.jp/pages/nape-pro

Anyone wanting one that could fit anywhere on any side of a keyboard could be interested.