5wt doesn’t go in the lowers, you need 0w30 for the lowers on pikes. 3wt in the uppers, but you need another syringe to do the charger damper anyway, it’s not a regular bath damper.
TBH id send that lot back get a bottle of 0w30 and a tub of stendec grease, will cost you a lot less than £42. The 35mm seals and foam rings are the only pain to get on their own, I tend to clean them up for a couple of services rather than replace each time. That kit also doesn’t seem to contain the crush washers that you might need for the foot nuts.
Although tf know their stuff so I’m sure it will all be fine.