Forum user @benjee10 made these parts 3 years ago, and is unable to continue.  While I am not going to make parts for it (I will accept new part if submitted to me), I updated their configs and releasing it now.  original thread:  https://forum.kerbalspaceprogram.com/index.php?/topic/148722-12-mk-x-spaceplane-parts-for-ksp-12-1875m-x-37b/ Mk-X Spaceplane Parts The parts are 1.875m wide and the cargo bay has space for 1.25m probes/payloads.  As usual, no pics = no interest, so he