Here is how I lit this shot:
Canon 5DII with Macro f2.8
I used my Apollo 27" softbox with the white cover on, camera right. Flashgun on full power as I was trying to kill all ambient in the room (didn't have a black background ).
2 flashguns on full power through a homemade pringles tube like this -
Camera left pointing vertically as a little fill. Rear flash as a little rim hovering over the camera around 45'.
There is nothing wrong with DIY modifiers, just don't bring them to paid work where clients can see.