My son and I have a set of Heath Super Parasol LNB plans and are planning on building one. The plans are Heath drawings revised by Lambert in the late 50's and early 60's.
Has anyone built a Parasol using these plans? I've got a couple questions concerning tubing sizes, etc....

The other question I have is that most of the fuselage tubing was mild steel with some noted 4130 exceptions. What are the implications of using all 4130? I know it's stronger but I've been told it is also more brittle. Any input?

Thanks in advance,
Steve Jones