How to do hovering pitch/throttle trim ?

Well, you've got me!

While it is possible to use the trim values in mixing, I'm not sure what is it good for....

Really?
Please send the model ini file.

What I do not understand is that the throttle/pitch stick doesn't auto center, so you don't have an exact position to which trim to hover.
Furthermore if you do 3D, that would give a very assymetrical pitch behaviour.

Or are they just to trim the other function of the stick, i.e. the pitch trim applies in normal mode, while you are controlling the throttle with the stick, and the throttle trim needed in idle up modes, when you control the pitch?

EDIT: sorry, but I only have a submicro CP, which won't stay in place without continious stick movements, so I don't have the idea how it could help...

I think I understand now, and may have a solution for it:

- On the trim list assign the TRIM_L- and TRIM_L+ to a virtual channel, say Virt1, and make the step a bit larger to see it's effect more easier.

- Define the throttle channel (ch3) as a three page complex mixer like that:
page 1: (mux=replace,) src=Virt1, curve=1-to-1, trim=on
page 2: mux=mult, src=THR, curve=3 point (0, 100, 0)
page 3: mux=add, src=THR, curve=1-to-1

Geez, that was hard!
Furthermore it still doesn't contain the normal trim, the flight modes, dual rates, or anything, it just demonstrates the hovering throttle...

Well, I don't see any reason why it shouldn't work with added fmode support, it just will be more complex. Don't forget, that the page order is crucial!
If you give me some time, I'll do it for you...

Could you post the original version of your model file without the hovering trims?

I see.
Do you really need CCPM mixing? (EDIT: I mean what swash type do you use with the original fw?)
What heli we are talking about?

Well, I've almost got it, at least the throttle one.
There is indeed a bug, which cause a crash at the 6th mixer page.
However it can be done on 5 page, I just needed another for the throttle hold, but that can be implemented otherwise...

So the solution for the throttle channel is:
page 1: (mux=replace,) src=Virt1, curve=1-to-1, trim=on
page 2: mux=mult, src=THR, curve=3 point (0, 100, 0)
page 3: switch=FMODE0, mux=add, src=THR, curve=1-to-1
page 4: switch=FMODE1, mux=add, src=THR, curve=3 point (f.e.: 100, 75, 100)
page 5: switch=FMODE2, mux=replace, src=THR, curve=3 point (t.e.: 100, 100, 100) (or it could be defined as fixed)

For the throttle hold page 6 should be:
page 6: switch=RUD DR, mux=replace, src=THR, curve=fixed, scale=-100
...but it can be done simpler on the channel page:
safety=RUD DR, safe val=-100


...to be continued with the pitch channel...

Yes, it is trivial, but we are trying to make such trim method, which only effects the mid-range of the stick...

PB has already corrected the issue, so in the next release you can use up to 10 mixers per channel.

BTW I've made the pitch channel too at work, but I forgot to post it.
But it is basicly the same, just uses Virt2 and different curves on the Ch6...

I've overwritten it with a rebuild!

I'll do it again...

I've made a template to show, how to do it:
8ch DEVO heli