Self hanging filament racking!

Here is what looks like it's just another spool rack, except it's one of a kind, none others seen like it.I am in a situation where i can't put any holes in the wall but i also can't put any adhesive strips on the wall so i designed this self mounting set up. It is designed to hold the weight of the spool by its own weight, it's been tested and has not failed!Requires no extra hardware to support except the shelf itself.I designed this for a shelf at 51mm wide and the length of 390mm. the internal hole is for a 16mm rod which can be ordered from internet ( wood or aluminium ) i used an aluminium rod which i got off a friend. The rod can be bought here : https://www.amazon.com.au/uxcell-Aluminum-Length-Industry-Projects/dp/B0C6QTRFR5/ref=sr_1_2?crid=ELLOWW2ZOEHE&dib=eyJ2IjoiMSJ9.P8sTvHnRiMSJvTvdPqn_CkcM6GFg06oM2hbKAHC-EI_mAIGrHd5FkEOE231s7a-rQrarD6iYF_ugA7tJ1BJaaYQLkn-anDoWx2ARcOu2PSVGEhlwqxiH_cvRLEuZ27e9_G_0b3iceI2TPpGltK07mydSzmb0BNC1sZtvn0kxycICAkadXYyu88_r_-Jod8P