working with meta tube?

i’m trying to make the shape of a finger with meta tube

now seems that you cannot joint theses !

so how do you work with theses ?

also seems that when you add a meta object there can be only one like that in the scene

even when you cpoy it it’s part of the same object so no need i guess to join there
cause it’s already done

but is there any way to add more then one meta object and how ?

but i you convert to mesh how do you get rid of all the inside vertices if any ?

any ideas are welcome here

Tanks for any help