Have you bought it yet? the Excalibur fits easily(alloy wheels) and it's insurance approved,don't think the Nemesis is.
Have a look on Utube,the videos cover them both,
it just fits my coachman but you have to have the special wheel nut in the right place because the bar that goes through the wheel hits the brake drum, motor mover etc...
the brake drum seems quite a large diameter compared to the radius length of the wheel lock.
------------- First van bailey ranger 550/6
Now the proud owner of a coachman amara
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets