8x10 inch development spool

thingiverse

This is my design for an 8x10 inch development spool intended for use in the larger JOBO 25xx series of development tanks, typically used in JOBO CPE/CPA/CPP or ATL rotational film processors. It's based on my earlier 13x18cm spool for Paterson development tanks, which can be found here: https://www.thingiverse.com/thing:3465241. This design can also accommodate 18x24cm sheet film. To build this spool, you'll need the following parts: * Two 8x10 Jobo spools * Three 8x10 Jobo braces or three 18x24 Jobo strebes * Four 8x10 Jobo brace 2s or four 18x24 Jobo andruckstegs * One 8x10 Jobo axis base * One 8x10 Jobo axis extension * A small amount of plastic glue Some notes to keep in mind: I didn't have access to an original axis during design, so I assumed the JOBO axis has the same diameter as Paterson. As a result, the holes for the axis are slightly too large. To fix this, I created two separate axis parts that can be modified to fit your specific development tank. Disclaimer: I designed and printed this spool for a friend who didn't need it for 8x10 film. The spool has been dry-tested with already developed film sheets, but I'm confident it will work well under real-world conditions. Update 2019-03-29: After receiving feedback that the 18x24cm parts were slightly too long, I updated them to be 180mm long, assuming a 178mm width for 18x24 film.