Problem about make proper rum

[macbookpro]

Hello everybody.
Hi Iv just recently had me a new stil made. It consists of 3 sections. The bottom section consists of a 50 L keg with elements.
The next section screws on to the keg and has about a 50cm unpacked column which also screws onto the top section.
The top section has a compartment that has a heap of 20 mm copper pipe cut up in it on top of a gauze.
This is about 20cm high. It continues into the condenser.
I want to make proper rum and not strip too much flavours out so I was thinking if I took the middle column section out and replaced it with a extremely small column will it act more as a pot still or will the copper packed section do its job too well and concentrate the alcohol.
Im aiming in the range between 60 and 75.
The still will usuall strip to 92%!