As a general note about the "Kit Taste". There is no definition of that, few people say they can taste it in every wine made from kit even after 2-3 years of aging, some other people say they cannot taste it at all. Most, myself included, taste it only in red kit wines and it tends to dissipate with time. Apparently WinExpert no-skin kits are the worst. It is most commonly described as a bit sweet taste in the completely dry wine. That is why many here believe, that it has something to do with the concentration process. It causes the sugar molecules to polymerize and these long molecules are hard to break for yeast. I do not think it is the case. There is not dependency on the kit concentration and the kit taste. In fact I have a Merlot made from 10-liter kit which does not have it at all and high end 18-liter kit which has it. I think it is the acid balance in the kit which is responsible. See, kits are made to be easily fermented at home in the fewest possible steps and with the least possible number of things which can go wrong. The producers have to pre-balance the acids in the juice so you do not test pH and do MLF at home. While this is seriously simplifies the process, it leaves the taste correction to the kit producer. And they make it to their palate. Apparently, WE likes their wines to be drunk young and adjust the acids in the juice to leave this sweet taste which helps to drink the wine young. Some time ago, WE had Crushendo series, it did not have the kit taste, but it was not drinkable until 18 months old. It became very good after that, but many people could not wait and complained. I think it is one of the reason it was discontinued despite huge popularity among forum members.
This Kit Taste, can be partially corrected by using tannin. At least I noticed that wines hit with a bit of tannin taste more mature and professional.
Wookey