Thank you for the acceleration. I hope it works.
Bythe way, I finally managed to find the link to my other transaction that is also stuck.

https://blockchain.info/nl/address/15UYZec7HeYEeKmprm4HxWVRsmGxDwbwwv

So if this one could also get a nudge in the back, it would be a nice bonus both for me and the one who helped me.