So far I have not found an ESP development module which can be inserted to a socket sideways e.g. to save PCB footprint (for use in smaller enclosures) and to increase module density (e.g. in a HPC application / ESP cluster / multi-ESP configurations). Here is one design I created (feel free to use/modify/improve/etc). I wish that some day a manufacturer realizes its potential and creates a product which we can buy.