"...for pcb assembly service." By JLCPCB? Unlikely: see my comment at the end. "Either looking for 2.54mm pitch connectors..." What sort? There are thousands! Datasheets? "or want (if possible) sensors soldered to pcb." The flexi PCB? "...does anybody know if this is achievable, considering that fsr's are very hard to solder, just too fragile for most people." I once visited a factory in Japan where they hand soldered a something like 40 way plastic flexi PCB onto the glass plate of an assembled LCD by hand simply using an ordinary soldering iron slid quickly and very deftly along the pads! "I thought about amphenol clincher type of connector." Datasheet? My comment at the end: You may (or may not) find this topic helpful: [https://easyeda.com/forum/topic/How-to-specify-rigid-flex-regions-on-a-rigid-flex-PCB-84ae74c7808b4777abee6d4bed877e11](https://easyeda.com/forum/topic/How-to-specify-rigid-flex-regions-on-a-rigid-flex-PCB-84ae74c7808b4777abee6d4bed877e11)