Years ago we at Adams & Chittenden Scientific Glass decided to re-engineer the whole cordset and connector, basing the connection on the glass  GL45 thread, which is a standard, rather beefy thread in common use in the chemistry and biology worlds. After several iterations, we arrived at a design utilizing a stopper unit using machined polypropylene and silicone, with stainless steel posts to connect to the heating coil. This design has proven very effective, avoiding many of the leakage, corrosion, and disconnection problems common in the older version. Older stills having the obsolete thread and cordset can be retrofitted for the new version.