Need help trying to join these vectors

I got to this point

then trimmed vectors to this point

And ended up here but can’t get them to join to look like the photo above

holder_1.c2d (56 KB)

I didn’t figure it out. I got this point but can’t join them.
holder_1.c2d (64 KB)

When I open this file and select the open geometry:

and choose “Join Vectors”, things close as expected:

The thing about CC is it works well but what I have figured out is if you have more than 2 objects then it is best to just join/boolean 2 at a time and then add the 3,4th or more one at a time. The Boolean gets confused with too many objects at once. Plus you get strange results if CC has to think too much at once.

If you have a set of objects which do not work as expected for a Boolean or Join Vectors operation, please make a post about them — in the current version these operations are quite robust and work well with hundreds, or even thousands of objects.