FX FX DREAMLINE: Bolt, cocking lever & magazine removal issue

Hello members
I'm hoping for some experienced advice on a problem with my Dreamline Classic 22
Here is the problem

I have a magazine stuck in place because the bolt will not retract far enough to remove it
This also has resulted in the gun not cocking

I assume the bolt handle & bolt need to be removed, and plan on doing that

What I'd like to know is if to do this I also need to remove the hammer & hammer spring assembly.
And if I can leave the trigger assembly in place while doing so

I've watched the 2 Ernst Rowe videos that are linked below.
And also have the schematic attached as well

It must be said that I really do not want to mess with the trigger assembly

Thanks
Edward