Hello and g' mornin' to ya OzIain! Welcome to the forum! Is this the picture of the 3D repair?
I would not be concerned too much about the condition of the heat cracks: Why? first of all, when you do your export, as you will be communicating about 99.321567% of the time with a Windows driver, do your export as Binary.What the ASCII export does is puts ISO Datas on the file header, which we really don't need. ( @ least until ISO statements are created for 3D printing) This allows a smoother transition in language between the types of drivers (Mac to Windows)I would like to see more of a view point for your file, now to the details:
Within 1 Rail Sweeping: you have the options for (A )perpendicular ( to the line of sweep)
(B) Rigid: Which will'hold in place' the swept shape, and uses an origin point to start.
(C) Sweep in Place: Similar to Rigid, but not needing the origin point.
do some eperimenting there.
Generally, I will use a One Rail Sweep with a leading edge on a wing, or the Vertical Tail to Dorsal fin lines.
Our next Tool would be a Guided Skin: Where let's say your doing a curve, and the "root" shape is larger than the terminating- End shape by a scale factor, you would click those 2 ends, then when prompted for the Guide curve, click that.
Our next paragragh of all these tools is the curvature type: as long as all items are the same, you will get good results. if you have a line mixed in with Interpolated Splines, you will get this result ( Pic 1(- I had to run a render of it, which took 42 minutes to crunch- and yes- I exported it as a STL file to play with.
One of the other 'proof of concepts" which I use very frequently, is to run a cover surface on my shape, which will show any math deviations from zero- yes, I've had many failures with a swept wing, due to a non connection of 1 to the 8th digit out( .00000001 Now the solids tools will usually run OK, but the surfacing tools need more accuracy.
Yes, you did post@ the right location, and I am pleased to be helping you today ( I get off werk @0700, and it's my Friday afternoon now!