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Anyone gone down this road?

Whilst I'm on modifications, anyone added any extra water keys?

I have a hook, just to pull the slide.

Had a ring soldered on the outside edge (not directly on top) of the slide.

I'm finding I need to push in for 1st valve Gs only ... Still finding out the quirks etc.

Thank you - that is exactly what I was after. I'll be making most of the those mods myself.

I may try for a little trigger on the first valve slide. It's popping it in for the G which is what I'm after - most of the time it's fine.

On the 621 I used to have, G up in the staff was automatic with 4th valve. Money in the bank. Might save you some soldering.