Anyone got tips on opening up a Delonghi La Specialista?

my la specialista started leaking from underneath after about 2 years of use. The silicone hose that connects the machine to the brew group had loosened at the clamp. Easy fix once I opened it up.
 
my la specialista started leaking from underneath after about 2 years of use. The silicone hose that connects the machine to the brew group had loosened at the clamp. Easy fix once I opened it up.

What kind of clamp does it use for the brew group? spring or screw clamp?
 
off topic but the grinders on a La Specialista is not the best for darker roasts. Retention is a nightmare and i still have beans from 2 weeks ago somewhere in there.