I'm interested in trying out some tray development of 5x7 negs and in particular using a slosher tray. There is a gentleman advertising on Ebay UK (he also frequents the APUG forum) who makes slosher trays deisgned for 5x4 sheet film. I have contacted him and he will consider making a larger version for 5x7 sheet film - probably a 4 sheet version that would fit inside a 16x12 processing tray (or even a version to hold 6 sheets of 5x7 film). Is anyone interested in a "group" purchase - I will find out how many units would need to be ordered to make this a viable proposition but in the mean time let me know if you'r interested.
The 5x4 version is item number : 200435562366. It appears to be well-made!