My brother has a set of Shimano SLX brakes. The hoses are too long and need shortening. I know this can be done without needing a bleed but it probably makes sense to get one in case it goes wrong and also in general for the future.
Whilst I am sure bleeding can be done with minimal equipment as someone who is not that confident it will probably be good to go for a kit of some sort. From experience would people recommend the Shimano one:
or the Epic solutions one: