Talking about drawing it sure would have been nice to have had the skills to do what Joe is doing with his Sopwith Baby project, and draw it all up in CAD first. Anything that doesn't quite add up then can be resolved before finding things don't fit
Here's an example. I'm in the process of making the centre section spars and have just noticed that there is a difference between the tie strap measurements and the spar of 1/4". On the Spar drawing the distance between the joint rod holes is 51" and yet on the Tie strap it is 51-1/4".
The drawing was done in April 1918 and has no signatures in the alteration section but has a note at the bottom along the line of "to original blueprint 8th Oct 1921".
Snipes were used right through to 1927 so occasionally parts were modified but annotated in the Alteration column.
So unless there's a reason I'm missing (as usual) why the difference I'm not sure which dimension is correct.
Nick