Swap out rails and belts, swap out the strut plates for larger ones and you’re good.
Maybe add in a brace in the gantry, if the difference calls for it.
Of a this, rhe strut plates are thr big job, because it calls for a cut job, but your initial.planned size is good enough for strut plates for a full sheet build, so you don’t need to re-install the temporary struts if you cut the new ones before disassembly.