OPT Reconfig Supplies highly needed config files to keep OPT Spaceplane Parts | Continued useful and alive in the absence of the original modder, @K.Yeon and in the changing KSP gameplay landscape. It is an optional enhancement to OPT's "Main" package (V2.0.1) and it does nothing by itself. It is required by OPT Legacy and by OPT Spaceplane Continued. Do not use this: With my old modlets OPT_USI or OPT_WBI. They are now features of this mod. With OPT Legacy v1.0.9