, Does anyone else remember when we converted to R134à from R12? Took awhile but when folks first started converting they found out the R12 seals and hoses and crimped connections we're allowing the R134 molecules to leak because the molecules are much smaller than R12. Similar problems were found on home units as well. Anyone know if the latest and greatest refrigerant is going to have similar problems with higher pressures and will it eat the soft portions of the lines from the inside out. What about the pressure switches that control the compressors,extra loads on the serp belts tensioners idler bearings