barth
Contributor
Here's what I've done:
both of my hands are purple from trying to loosen it by hand.
I'm using a https://www.amazon.com/gp/product/B000E7VG4S/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Put your mk25 on the floor on a surface that doesn’t scratch. Put your shoes on. Put one feet on your mk25. Put the other feet on the allen key.
That did work for me.