Alcoengine vs Pure distilling reflux column.

[nikolav]

Hello from New Zealand, guys.
So far I haven't distilled anything and I'm just a proud owner of an Alcoengine pot still (still In the post), without a boiler, reflux column etc.
Now I need to get a reflux column, as I want to start with vodka/neutral/gin.
I'm trying to decide between two options - Kegland's Alcoengine and the Pure distilling Reflux columns.
Alcoengine is cheaper (half the price if I order from www.5stardistilling.com.au), but what worries me is the different recommended water flow rates between the two.
If I'm to believe the user manuals, which I take with a grain of salt the recommended water flow rate for the Alcoengine is min. 8 l/m and for the PD it's just 1.5 l/m, which is a very big difference.

In your observation, guys, are these true numbers? Any other differences between the two that I need to know about? Any pros and cons?

PS. I'm absolutely not interested in building my own still. Not yet, so I'm trying to choose between those two, and I still haven't ruled out the T500 reflux column.