I met up with one of the designers/builders/creators of the Altivolus.
Purchased a 2nd hand version (numbered #1) and went back home. Once home (it was a 3.5 hour drive single way) I started to configure my programming in the Taranis.
A bit later than expected I was finished so I went out at 22:00 -ish and had a go. All feels good.
A few days later I finished the programming and now I have all flaperons set up for various flight modes
Launch, Glide, Thermal, Speed.
Everything is totally independent so I can adjust left or right flaps or elevator at will.
Now If I could fit the altimeter inside…