Round Tip at End of Sweep or Loft

 From:  ed (EDDYF)
9887.7 In reply to 9887.1 
Hi Don -

You're real close to capping the hook.

Using your curves, I Trimmed the arc at the tip of the hook in half, then joined the top half to the top rail, and joined the bottom half to the bottom rail.

I also had to join some curve segments at the rear of the assembly to completely form two rails (shown in green & blue)

Then I selected the six orange profiles and performed a Sweep using the green & blue curves for rails.

The result is a nice cap on the hook.

You can finish up with making the cut-out for the hole, add fillets, etc.

I think that little appendage bump-out coming off the left side of the hole is probably best made as a separate object, then Boolean Union & Fillet with the main solid.

Ed Ferguson