fucil de sapele

Nice, you don't usually see a video of a gun. I think this should become more popular.

Good clean work on this gun. Handle choice, ehh..

I agree. I like seeing it in three dimensions. Or at least a two d version there of

Looks like a Niletec top line release mech, it's a good mechanism. Why do you think you need something better?

I'm sure this gun is going to work to your satisfaction. Still not too late to put a better handle on it and recess the line release.

A reverse mech will give you a couple of more inches of band pull. But the quality of materials, holding power, and smooth trigger pull, will be the same.

That said the new generation of Speardiver reverse mechs comes with a counter sunk top screw, and ribbed casing which looks nicer in my opinion.

What will make more of a difference for you, since it looks like you're using south African carbon steel shafts, is to use a reverse mono mech. This will allow you to gain band stretch and connect the mono to the back of the shaft. But not with a track as deep as you have on this gun.

which spear is that in the vid?

thanks

Your trigger problems may be caused by the mech not being "parallel" or in line with the spear.
It looks like the mech is installed at an angle to the spear, that will cause problems with engaging the shaft.
And once you have hammered the shaft in place it will then affect trigger pull.
I have installed some NileTecs and have experienced similar problems if alignment was off.
If you take out the mech and try to engage a spear at different angles you will see what i mean.
It is a very good mech though.