Some of the zig zags come off the CRT scan lines of course, so if you're using printed material, the lines may be straight. If they are straight on the screen at 000 and 090 degrees, then they should print straight at any angle.
Some years ago i used a mixture of TurboCAD and coral -- formally Xara SP?? Most of the aircraft electrics was done with the Coral product and worked quite well, but i had that free with Word Perfect. However, both of these are old tech and either cheap or free...if you're lucky.