Hi, So I've started ordering parts for my build. I'm reviewing my openbuilds part list and this is the last thing I need to decide before placing the order. I decided to lengthen the y to 1500. I see alot of the HD - beefed up ox's use a stiffener plate. That would mean I couldn't fasten the rail to spoiler board which I had planned to do to help stiffen things up. Am I right thinking it's not a good idea to have a free spanning 1500mm 8020 rail for the y ? I'm considering using a C-beam, stiffener plate and the planned dbl belt system. That or the 8020, no stiffener and fasten it to spoiler board. Any opinions?