I removed my old compressor and dryer today and am going to install the new stuff when it comes in tomorrow (hopefully). I bought a new dryer, belt, O-rings, and a lightly used compressor and clutch. I have been thinking of a couple of items: 1. After installing new O-rings, is it possible to use Teflon tape for the threads for a better seal on the compressor and dryer, or is it better just to tighten the fittings down dry? I just don't want any leaks with this $$$ R12 system refrigerant. 2. What are you guys typically paying to have a system vacuum tested and recharged with R12? I was quoted $ 60/lb at a shop down the street for the recharge. 3. I am not sure where the original leak was in my old system (PO said he had to refill it once a year until compressor burned out), but I am hearing that leaks are usually at fittings (i.e., compressor and dryer). Are there any other areas where FJ60s are know to develop leaks in the refrigerant lines? Thanks.