wishbone jigs

[happyjo]

Guys please forgive my stupidity.

I see the pictures for the rear upper and lower wishbone can be made via the Talonsport method (I must say very good idea).
I can buy two metres of 25mm box section from B&Q for £15 and some of their cheap G clamps.
My stupid question is can you do the same for the front, I know the top sections are angled but if you purchase the lower wishbone plates with the 10 degree bend will it still work?
You could tack weld the top of the A frame to the section of 25mm making the top of the rectangle, would this hold or would some other method of attaching it work?
If it did work, could you make the front upper wishbone frames the same way but now turn the top 25mm inwards by 8 degrees?