Hello guys,
here is a little help to disassemble the Nemrod as requested.
as I said earlier, I want to keep this Nemrod as is so I can't disassemble it completely, so I'm going to do my best to explain with what I have.
This is my experience with only 2 Nemrods, I didn't have issues with those but I can't garranty that this is the right way to do it or that you will not have something happen on yours that didn't happen on mine.
first of all, work in an appropriate spot to do this. the back of the harpoon can be filled with more or less oil and it can drip on the spot you are using. this is just a friendly advice to avoid trouble with your wife

I know that this happens and still I got several spils today...
the oil can drip from both ends of that blue tube and it might also drip from the aluminium round part at the back of the pistol when disassembled, have paper towels at the ready
alright, here is our Nemrod:
first off, you need to unscrew counterclockwise the yellow cap at the end, this can normaly be done by hand:
here we go:
now, I'm not sure as I never had any issues myself, but I think that air needs to be released before removing the cylinder and I think , once again, that this is done with that screw at the end. turn it counterclockwise half a turn or something until you possibly hear a "psssch", then turn it back clockwise.
alright, now you can remove that back tube! so, for that purpose you need either a 17mm (I think from memory) wrench or an adjustable wrench like I used bellow, the trick is that the jaw has to be thin enough because the flat spots on the tube are pretty narrow.
once you have found the right tool, turn counter clockwise again until the part unscrews.
this end part is actually threaded into the inside tube, so when you start unscrewing, you'll see that the main blue tube becomes loose. you need to unscrew the back part completely, then just pull on the blue tube.
Carefull, this is where the oil will start dripping!
and here we go:
at this point, I can't show more on my Nemrod, but you have two solutions I would say.
- first one is to unscrew, if you can, the two screws on the white handle, you'll then have access to the thin rod that you can see above, it is attached to the trigger and you can remove it and pull it from the back.
- second solution that I never tried but I guess this would work fine, just cut everything from the back there without opening the pistol.
for my kit, you'll need to cut the thin blue tube at the back as close as possible to the back of the gun. I have put a little bit of room on my V8 aluminium part to accomodate for an imperfect cut though.
your harpoon ready to be converted will look like this:
last thing, the barrel tube needs to be clear to be able to put a threaded rod through it. In my case, I had one pistol with something stuck at the front end of the barrel and Kurtiboy had his stuck at the back end of the body of the pistol. I think this part bellow is supposed to be around the middle length of the back tube and should not normally get in the way, but it seems that sometimes it gets stuck somewhere else inside the barrel.
In my case, I took a long thin rod and a hammer and hammered it out without too much trouble.
alright, that's it. i hope this helps.
I would say proceed with caution if you have read somewhere that parts can fly off, but I really haven't experienced anything crazy in my case proceeding like I showed.
don't be discouraged by the long text, it's not a difficult conversion to do.
cheers