My thoughts entirely,maybe it's me with vast experience of having to adapt but out in the field not with this particular problem is making bottle adaptors from sealing caps metal of course,being faced with a 3/8th fitting on a receiver tank and cobbling a two nuts one 3/8th and one 1/4 and a piece of 1/4 tube big flare for the 3/8th hey presto a reducer is born but hey I am old school and not a defeatist.