Assigning controller settings to a specific aircraft (?)

There are plenty of preconfigured SPAD.neXt files in the internet (“Online Profiles”) which you can download into SPAD.neXt. No need to do the work yourself (except for a very exotic device). Some are for a complete controller (Saitek Pedals etc.) and some are for single buttons/axis only.

Another solution is the recent Aircraft Manager. There is a free trial available.

Plus, I think Lorby’s Axis and Ohs should be able to do this, too. While both of the first ones work for me, I never tried the latter myself, though.