Design piece of rigid frame for 49 VG

[walterschroh]

Hi to all!, i have a VG Ariel with a frame modification, i wanna try to adquire a original frame ,but in my country is very difficult (Argentina), i design a piece of rigid frame from a diferent pictures, but i need some help with the sizes/measures, could you please check this and send me the real measures?, i create in mm, but i dont know if this are in inch...ther is a only one side, but i have creating the othr side too.
Note: the angle between two pipes is 52 degrees....this is correct?
Thanks a lot!

[adrie.degraaff]

Hello Walter,
these castings are made by Ariel Atzori for members and on this site are drawings with angles.