If you're scratch building and you have some basic CAD drawing skills, here's a hint for you.
I found drawing parts in AutoCAD, printing and sticking the drawing to the metal you need to cut, is much easier, quicker and much more accurate than drawing directly on the metal with a sharpie pen, especially for complex parts.
I've done this for nearly all parts I had to make from scratch, flat and angle parts, unless there was a full scale drawing from sonex off course which you can just copy and stick to the parts.
If the parts are small enought I just print them on my home printer, for larger parts I use the plotter we have at work, make sure your printer/plotter is well calibrated first so the drawing is accurate.
Here's some examples:
http://www.mykitlog.com/users/display_l ... 0785&row=2http://www.mykitlog.com/users/display_l ... 0786&row=1http://www.mykitlog.com/users/display_l ... 270&row=16http://www.mykitlog.com/users/display_l ... 610&row=56I picked up this method from this YouTube video:
http://www.youtube.com/watch?v=phSN6vC0ee4The only catch is, you have to make the drawing yourself and keep it for yourself, Sonex has clearly stated on a number of occasions we are not allowed to share any such CAD drawings! They could take us to court if we do!