I was talking about this subject on the "other" site while discussing the merits and drawbacks of converting the a/c on a Ford pickup to R-134, and the best suggestion I heard was to put a second condenser in, if it could feasibly be plumbed into the first. I asked if there could be any problems besides dealing with the connections, and the reply I got was that the only problem I'd have would be scraping ice off of the inside of the windshield.
I haven't tried it yet, but have been thinking about doing so on both vehicles (the 300D was converted before I bought it; the truck still needs to be converted)...
One other thing I thought about (haven't done this yet) is to put some insulating foam over the low-pressure side...on my car, a lot of that's bare metal and we could be losing some efficiency due to that line being heated up by being in the engine compartment...
Just some thoughts
