Due to the small clearance of the stock print fan it kept knocking off the clips holding down the glass plate when printing large objects. better view to the nozzle so you can see what's going on. I made two version one in a 30 dg angle and one in a 45 dg angle. I am pleased with 30 dg version so never came to test the 45 dg angle version.just print and mount. used 2 3mm skrews and nut.