Rik,
Mine were suffering stiction terrible, I tried everything (oil weights, oil brands, greases the lot!) In the end I sent em to TFT for a service and he swapped out the main oil seal that sits under the wiper seal for 2 foam rings. Made a massive difference to my fork, I even tried a firm spring as a result (I’m around 90kg’s loaded) but it was too firm.
From what Tim said this is standard on the Boxxer (1 wiper seal and 2 foam rings) which makes the super plush, just need to service them a bit more.
I have had this mod done for a year now and have serviced the about forks 5 times, just had to order some more Flooks Fluid!
I would have a look at this mod as it’s cheap and easy, all you need is 4 x 35mm foam rings for a boxxer.