Glad to hear you've had success Michel. I run RA4 in my jobo. I havn't in about a year but have shot many color pics over the summer and will start printing again this fall. Regarding the chemical, I order my chemicals from Photo Service. My developer comes in a box with small bottles that I can make 2 litres at a time for a total of 8 liters. The catalogue number is 861 9769. I use the same blix as you. I like the developer I use because it allows me to make 2 liters at a time which is about what I need for a printing session.
Glad to know others in Montreal are printing RA4