I ended up not taking @JurekB up on his very kind offer because I realised that I was being an utter fucking dunce.
The blade guide I was using was too big for the knife so the knife blade wasn't even in contact with the whetstone. All I was doing was grinding down the blade angle guide.
Once I realised this, I gave it a go with my best guess at 20 degrees and now have a knife so sharp that I got a bit carried away..my left forearm is now basically hairless.
I ended up not taking @JurekB up on his very kind offer because I realised that I was being an utter fucking dunce.
The blade guide I was using was too big for the knife so the knife blade wasn't even in contact with the whetstone. All I was doing was grinding down the blade angle guide.
Once I realised this, I gave it a go with my best guess at 20 degrees and now have a knife so sharp that I got a bit carried away..my left forearm is now basically hairless.