Before and during surgery put the donor bulb in ice and keep it as low below the splice as possible. don't use the tubing cutter, it will crush the tube closed. I used a cut off wheel to make the cut and make sure the tubes are open and clear, I used a welding torch round file to clear the tubes. Be very careful not to use too much solder as it can run in and fill the tubes. test the gauge in boiling water, It won't ever get over boiling temperature, And go though heat cool cycles a few times dunking it the boiling water and ice water to make sure it doesn't bleed down from leakage. yes it can be done.