use artcraft. best chemical company !

i find 5x7 and 8x10 very easy to work with. smaller plates i find harder than the bigger ones actually. they are too small so it feels like all the pouring happens it just takes less tiem to travel end to end on a smaller plate.

5x7 is y favorite and most used wet plate size. enjoy.

did you also get coffer's manual. an invaluable resource.