I am wondering where you all are buying and what grade of aluminum you are using for CNC router gantry sides and such. I live in Germany and sourcing Alu plate 20mm thick in sizes big enough to build gantry sides and reinforcing structures seems I will have to sell one of my kids to have enough money! Although selling one kid is not so bad the wife wants to sell the one I want to keep. So it could cause family issues. 20mm thick by 1000x1000mm is over 800Euros. Is that what you all are paying?