I figured it makes sense to have a tweeter sphere thread here as well.
I started making another set last night, worked on them a bit more tonight.
I buy solid wooden spheres ($1.50) - like knobs or post tops, at my local Hobby Lobby. i hollow out a cylinder, (using Forstner bits, hole saws, dremel, etc.), drill a hole for threaded rod, and then... i'm not sure where to go next for a nice finish.
tools i use
i used double-sided foam tape to hold the sphere in the vice without making marks. works well.
I had to dremel sand the opening a bit larger in order to fit. the Forstner bit was either too small or too large.
rods screwed in
wires soldered on tweeters
going with hammered silver paint (to match my painted interior)
painted and waiting (pic taken 2 hours ago)
i haven't decided how best to finish off the mount. there is a gap around the tweeter face due to it's construction. the widest flange is in the middle. so i need something to create a smooth transition. and then the grill - the Vifa doesn't have one. i have one, but it's larger than necessary.