50% of the time, I do not need more than 15' of power cord. So, I would recommend that you shorten your current cord and use the rest as an extension if needed. That would just involve two new ends to be mounted. I may do this myself in the near future on my 35' cord.
Currently, I find it easier to move and store the cord all coiled into a container. So I have been using this garden tub for the past 7 years.