Turbo Air Still 1st run Observations

[makum101]

Hi Guys, Newbie here . I need advice on my first run and comformation of what i think went wrong.

I bought a StillSpirits Turbo Air Still (4 Ltr capacity). Did my first run yesterday and although it is crystal clear and drinkable the finished product has a yeasty flavour (even on top of flavouring essence).

I think the above may be due to me thinking that my wash (21 ltr water + 6 bags of sugar and triple distilled turbo yeast + carbon stuff packet) was not finished after the specified 7 day period due to bubbles still coming from the air lock.

I left it for another 3 days, but it was still bubbling. At this point I checked the specific gravity and it was well below the 990 mark so I de-gassed it and added the finings. This topped the bubbling.

My question is this: Could the yeasty flavour be down to the fact that i left the wash sitting on the yeast for 3 days before fining, de-gassing and stilling? or is it just due to using a sugar wash with turbo yeast?

I did use the carbon filter after stilling but this made no difference.