fiddly precision when build crafts

[steuben]

short cracking open excel, or building a program, is there a way to get centimeter precision when placing parts? doing it by hand yields this kind of a spread:

14.54612
14.56279
14.57946
14.59613
14.6128
14.62947
14.64614
14.66281
14.67947
14.69614
14.71281
14.72948
14.74615
14.76282

 

especially when placing those structural panels end to end.

[Montag]

Get it close then manually edit the craft file.  Some trial by error required.

[steuben]

Some error... much trial

I've managed to iron out many of the little waves and line things up. and strip out much of that floating point cruft.

But, I've reached the limit of what I can do in Excel, or at least do simply in Excel. mostly since I'm planning to smooth out nearly 800 of the 2x2 panels. Which means I'm probably going to have to change tools.

I can glean a fair bit of info directly from the craft file. And I know some of the entries are ignorable, But, is there any available documentation for craft file format? There doesn't seem to be any on the wiki. But I could have missed it in my searches.