I always like to see new 3D printer designs and builds by different people. Recently I found this larger volume (40cm3) machine by "Thomas Workshop" on Instructables. It is fully made from common aluminum profiles and Thomas did put some effort to document and present his work process.
Test prints look good and the frame seems sturdy.
Here is the final video from three part series showing electronics and printing:
Here is the detailed step-by-step build guide with videos, documentation, and picture construction log: