Yes. I made it about 6 years ago for my GF. She also plays mandola and mandolin, while I play Guitar and Mandola.

The banjo has a single strat pickup, and no volume control, as she hits it by accident in gigs.

You're a man who knows his guitars.

The body (3 piece) and neck are mahogany, with a glue joint at the heel. The fretboard is very pale rosewood, with a slight curve to it. The trus rod is a hollow box bar, 10mm to a side, fixed and non-adjustable, as I set it right in the first place. Should never need adjusting, ever, as the timber was well-seasoned, about 6  or 7 years before biulding.
I had originally planned to make the body round, but I left a corner for the strap button, otherwise it was very top heavy.

By the way, it has 4 strings, being an 'Irish' tenor banjo tuned e,a,d,g at base. Are you in the USA, do you have them?

Feel free to ask if you need any making/repairing advice. Twas my job for a few years.

Huh, I would have thought the banjo sound would have bennefited from a harder wood on the frets, like Maple to give it that harder sound.  Then again, I've never made one ; )
Not certain about the Irish banjo thing as I never was into them very much.  They very well could be around here (in the USA), but I've never noticed one and it's been some years since I was even in a shop - can't work my hands well enough to play any more.  Wish I could though...

I would have used maple, but I was out of stock of such a large piece, as we just don't use it much in the UK.