This flow management (FM) design of reflux still has been designed to create high percentage pure neutral spirit.

The FM technology used in this design makes this process robust and easy to use. No need to worry about water pressures and fine tuning of water flow speeds. The FM design gives you direct control of the reflux ratio and therefore the purity of your end product. It’s never been so easy to enjoy the craft of distillation.

Do you want to distill faster or get higher purity spirit?  Then you should try this stainless extension tube.
This stainless steel extension tube can be filled with copper or stainless packing.  By increasing the volume of the reflux still column this will enable you to get higher purity and/or collect spirit faster (it's basically a trade off between the two).