Hi. I replaced the Mickey Mouse (apologies to Disney) "dual condenser" setup with a parallel flow condenser, and fitted a Sanden compressor. This enabled tidying up the hose runs, and involves new hoses with much better fittings, so I"m no longer constantly chasing leaks. I'm using 134A, and it works well, although I must admit I haven't tried it in the Nevada desert. Hope this is of some use.
Cheers, Dale.