What are the pressures like?
Check your fan clutch. Your condenser will be a problem, but the system should still work OK-ish unless the fan clutch is shot. Don't ditch it, FIX IT! Any compressor with the RV2's capacity is going to use the same amount of power, contrary to what you have heard about old recips being power suckers. If you get the head pressure under control it will use a lot less power, not to mention cool better. What year is your car? A retrofit parallel flow condenser may already exist that fits your vehicle. Alternatively, you can go with my boilerplate recommendation: make sure the system is totally leak free, and run R-12 & mineral oil. Of course, along with that boilerplate I always suggest running a parallel flow condenser if one is available. Even with R-12 it will still improve capacity, reduce head pressure, and further reduce compressor power consumption.
And who cares about the weight? It's not like you have to carry it around under your arm wherever you go. I've never understood people's obsession with the weight of AC components on a vehicle with a cast iron engine, all steel frame and body, etc.
If you didn't really need it, why did you even bother in the first place? You must've figured you would drive it now and then in the summer. Assuming the fan clutch is OK, you can fix it with either a condenser or R-12. Not really a big deal. But in the end it's your vehicle. I'm thinking WG is just annoyed because you got so much help to get it working, and now you're ready to throw in the towel at the first problem.