4x5 film developing reel/holder/insert for paterson 3 tank

Description

4x5 film developing reel/holder/insert for paterson 3 tank
Made out of aluminium (and sometimes brass), either bare or sandblasted, with an applied conversion coating to delay oxidation, these holders fit a standard Paterson 3 tank. They hold 8 sheets of 4x5 film, and need 1 liter of solution. Other configurations (6, 7, 8, 9 or 10 sheets) are possible.
I've been developing 1000+ sheets with this holder over the years, and have gotten scratch free negatives, even developing, and repeatable results.
Mostly b+w, some C-41 and E-6.
Gentle agitation is key, so as not to dislodge the sheets from their position. Some developers, like HC-110 with Kodak B/RA x-ray film, need constant agitation.
Loading is tricky in the beginning, but becomes quite easy after a few practice runs.
Made on a per order basis, lead time would probably be around 1-2 weeks.