Tia, I think they may be a bit confused, or simply not want to fit the mover.
We had an Eriba dealer fitted Reich 1.8 fitted to our 2017 Triton. This would be the same configuration as a Troll set-up. It gave a ground clearance of about 160-170 mm.
Our new Eriba Feeling has an Eriba dealer fitted Reich 2.0. This has a ground clearance of about 140 mm, which looks low but no owners have reported an issue.
Somewhere on a European website I managed to access a Reich technical page that stated ground clearance minimum was a surprisingly low 100-120 mm
As such, your and my Reich 5 year warranty should be valid.
Colin