A Patterson tank with an adjustable frame for 3.25x4.25??
News to me.
I use the Patterson System 4 tank with handmade nylon screen tubes that you fit the film in (Emulsion to the inside). You get 4 or 5 tubes per load. Develop just like 135 film. The other solution is with fluorescent tube protectors cut to length, but then you have an additional step of washing the anti-halation film off the back when you are finished processing.
Good luck. You will find processing your own give infinitely more control over your whole process.
tim in san jose

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