Duo Gravis ergonomics
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Duo Gravis ergonomics
I'm trailing a Duo Gravis that I'm thinking about buying. It has the original stacked triggers. I'm finding the left hand ergonomics uncomfortable. When I depress the F trigger my thumb hits the brace before the trigger is fully depressed. Also I have to do a shift with my hand to press the D trigger.
Can anything be done to make it more comfortable? I would not want to split the triggers.
The horn really plays well. Much different than my 72H. And twice as heavy!
Can anything be done to make it more comfortable? I would not want to split the triggers.
The horn really plays well. Much different than my 72H. And twice as heavy!
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Re: Duo Gravis ergonomics
Set the valve stringing so that the bottom paddle is well behind the bell brace and so that it is even with the bell brace when depressed. Press that paddle without bending your thumb. Then, a simple bending of your thumb at the first joint can easily activate the upper paddle without re-positioning your hand. A thin rubber pad added to the lower paddle can help immensely. I secured mine with electrical "shrink wrap" tubing. It's worked perfectly since I bought my DG/SS in the 70's.
- HawaiiTromboneGuy
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Re: Duo Gravis ergonomics
Do you have large hands? For me, I have smaller hands being Asian so all I really need to do is pivot the upper part of my thumb down to engage that second valve. I can use the lower part of my thumb to engage the first valve/trigger without interference.
Drew A.
Professional bum.
Professional bum.
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Re: Duo Gravis ergonomics
A 'stick on' felt pad, trimmed to size on the paddle worked for me. Easy and cheap.
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Re: Duo Gravis ergonomics
Thanks for this idea! I built the triggers up with peel and stick cork. Also, the Yamaha Strap helps, but the finger ring is in the way a little. If I end up buying this axe I'll probably switch to a Neo Tech.
- Kingfan
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Re: Duo Gravis ergonomics
Everybody is different. I had no trouble when I demo'ed a DG, but had to get a Neogrip for the 7B I bought instead.
I'm not a complete idiot, some parts are still missing! 
Greg Songer
Blessing USA small bore student horn, Bach 5
King 4B-F: Bach 5G

Greg Songer
Blessing USA small bore student horn, Bach 5
King 4B-F: Bach 5G
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Re: Duo Gravis ergonomics
Here's what I've come up with. Thanks to an idea from RichC I put the self stick cork on the trigger paddles. Then I added the Yamaha Strap but was still uncomfortable so then added the Wise Grip under the Yamaha Strap.
Using this set up changed this Duo Gravis from a horn I wasn't going to buy into a horn I hope to buy.
Using this set up changed this Duo Gravis from a horn I wasn't going to buy into a horn I hope to buy.
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Re: Duo Gravis ergonomics
I use a Wise grip on my Duo Gravis. I may try a strap at some point. But, I wonder if having it so high on the hand grip will eventually torque the slide out of alignment?bigbandbone wrote: ↑Mon Mar 02, 2020 8:41 am Here's what I've come up with. Thanks to an idea from RichC I put the self stick cork on the trigger paddles. Then I added the Yamaha Strap but was still uncomfortable so then added the Wise Grip under the Yamaha Strap.
Using this set up changed this Duo Gravis from a horn I wasn't going to buy into a horn I hope to buy.
--Andy in OKC
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Re: Duo Gravis ergonomics
I thought about that too. But the finger ring is a very strong reinforcement against that type of torquing. If I buy this horn I might have a strap made with a loop large enough to fit over the finger ring and get the strap closer to the brace.afugate wrote: ↑Tue Mar 03, 2020 5:45 amI use a Wise grip on my Duo Gravis. I may try a strap at some point. But, I wonder if having it so high on the hand grip will eventually torque the slide out of alignment?bigbandbone wrote: ↑Mon Mar 02, 2020 8:41 am Here's what I've come up with. Thanks to an idea from RichC I put the self stick cork on the trigger paddles. Then I added the Yamaha Strap but was still uncomfortable so then added the Wise Grip under the Yamaha Strap.
Using this set up changed this Duo Gravis from a horn I wasn't going to buy into a horn I hope to buy.
--Andy in OKC